Description of problem:

Due to there is a 63 characters limitation of route name, this will result in the directvolumemigration-rsync-transfer-route creation failure in target cluster, so the direct volume migration failed.
The route name is composed of "prefix + migplan name + domain". The length of the prefix "directvolumemigration-rsync-transfer-route" is 43, the length of domain + prefix has already more than 63. There still is migration plan name. 63 is too small. 

How reproducible:
always

Version-Release number of selected component (if applicable):
MTC 1.4.0


Steps to Reproduce:
1.create any application in source cluster 
$ oc create namespace ocp-55555-nginx-default
$ oc process -p NAMESPACE= ocp-55555-nginx-default -f nginx_with_pv_defaultsc_template.yml | oc create -f -


2. create migration plan for ocp-55555-nginx-default
Just follow common migplan creation process, when enter into "Migration option" phase, checked "Use direct PV migration for filesystem copies" option.

3. trigger migration process

Actual results:
Direct PV migration will failed, the "directvolumemigration-rsync-transfer-route" failed to be created in target cluster

Expected results:
The direct PV migration process should be successfully

Additional info:

In target cluster
$ oc get route -n ocp-55555-nginx-default 
NAME                                         HOST/PORT     PATH   SERVICES                                   PORT   TERMINATION   WILDCARD
directvolumemigration-rsync-transfer-route   InvalidHost          directvolumemigration-rsync-transfer-svc   2222   passthrough   None

$ oc get route.route.openshift.io/directvolumemigration-rsync-transfer-route -o yaml -n ocp-55555-nginx-default
.......
status:
  ingress:
  - conditions:
    - lastTransitionTime: "2020-12-16T08:27:10Z"
      message: 'host name validation errors: spec.host: Invalid value: "directvolumemigration-rsync-transfer-route-ocp-55555-nginx-default.apps.cam-tgt-12730.qe.devcluster.openshift.com": must be no more than 63 characters'
      reason: InvalidHost
      status: "False"
      type: Admitted
    host: directvolumemigration-rsync-transfer-route-ocp-55555-nginx-default.apps.cam-tgt-12730.qe.devcluster.openshift.com
    routerCanonicalHostname: apps.cam-tgt-12730.qe.devcluster.openshift.com
    routerName: default
    wildcardPolicy: None


in source cluster
$ oc get pod -n ocp-55555-nginx-default
NAME                                              READY   STATUS    RESTARTS   AGE
directvolumemigration-rsync-transfer-nginx-html   0/1     Error     0          58m
directvolumemigration-rsync-transfer-nginx-logs   0/1     Error     0          58m
directvolumemigration-stunnel-transfer            1/1     Running   0          58m


$ oc logs directvolumemigration-stunnel-transfer -n ocp-55555-nginx-default
2020.12.16 08:27:39 LOG5[ui]: stunnel 5.56 on x86_64-redhat-linux-gnu platform
2020.12.16 08:27:39 LOG5[ui]: Compiled/running with OpenSSL 1.1.1g FIPS  21 Apr 2020
2020.12.16 08:27:39 LOG5[ui]: Threading:PTHREAD Sockets:POLL,IPv6 TLS:ENGINE,FIPS,OCSP,PSK,SNI
2020.12.16 08:27:39 LOG5[ui]: Reading configuration from file /etc/stunnel/stunnel.conf
2020.12.16 08:27:39 LOG5[ui]: UTF-8 byte order mark not detected
2020.12.16 08:27:39 LOG5[ui]: FIPS mode disabled
2020.12.16 08:27:39 LOG3[ui]: Error resolving "directvolumemigration-rsync-transfer-route-ocp-55555-nginx-default.apps.cam-tgt-12730.qe.devcluster.openshift.com": Neither nodename nor servname known (EAI_NONAME)
2020.12.16 08:27:39 LOG4[ui]: Insecure file permissions on /etc/stunnel/certs/tls.key
2020.12.16 08:27:39 LOG4[ui]: Service [rsync] uses "verifyChain" without subject checks
2020.12.16 08:27:39 LOG4[ui]: Use "checkHost" or "checkIP" to restrict trusted certificates
2020.12.16 08:27:39 LOG5[ui]: Configuration successful
2020.12.16 08:27:39 LOG5[ui]: Binding service [rsync] to :::2222: Address already in use (98)
2020.12.16 08:27:48 LOG5[0]: Service [rsync] accepted connection from 10.128.2.33:58590
2020.12.16 08:27:48 LOG3[0]: Error resolving "directvolumemigration-rsync-transfer-route-ocp-55555-nginx-default.apps.cam-tgt-12730.qe.devcluster.openshift.com": Neither nodename nor servname known (EAI_NONAME)
2020.12.16 08:27:48 LOG3[0]: No remote host resolved
2020.12.16 08:27:48 LOG5[0]: Connection reset: 0 byte(s) sent to TLS, 0 byte(s) sent to socket
2020.12.16 08:27:48 LOG5[1]: Service [rsync] accepted connection from 10.128.2.32:44582
2020.12.16 08:27:48 LOG3[1]: Error resolving "directvolumemigration-rsync-transfer-route-ocp-55555-nginx-default.apps.cam-tgt-12730.qe.devcluster.openshift.com": Neither nodename nor servname known (EAI_NONAME)
2020.12.16 08:27:48 LOG3[1]: No remote host resolved
2020.12.16 08:27:48 LOG5[1]: Connection reset: 0 byte(s) sent to TLS, 0 byte(s) sent to socket

$ oc logs directvolumemigration-rsync-transfer-nginx-logs -n ocp-55555-nginx-default
2020/12/16 08:27:48 [1] rsync: safe_read failed to read 1 bytes [sender]: Connection reset by peer (104)
2020/12/16 08:27:48 [1] rsync error: error in rsync protocol data stream (code 12) at io.c(276) [sender=3.1.3]
rsync: safe_read failed to read 1 bytes [sender]: Connection reset by peer (104)
rsync error: error in rsync protocol data stream (code 12) at io.c(276) [sender=3.1.3]