Description of problem:

engine-setup just to configure websocket proxy instructs user with wrong command.

~~~
          2. execute, on the engine host, this command to enroll the cert:
           /usr/share/ovirt-engine/bin/pki-enroll-request.sh \
               --name=websocket-proxy \
               --subject="/C=<country>/O=<organization>/CN=websocketproxy.rhev.lab.eng.brq.redhat.com"
          Substitute <country>, <organization> to suite your environment
          (i.e. the values must match values in the certificate authority of your engine)
~~~

the wrong thing is '--name=websocket-proxy', as this is default value and thus it would override already existing certificate on engine node (let's suppose most users would just hit <enter> when configuring engine).

either put there <whatevertodistinguishyourwebsocketproxycert> or even better just start naming certs based on 'CN'.

Version-Release number of selected component (if applicable):
ovirt-engine-setup-base-3.5.0-0.0.master.20140629172257.git0b16ed7.el6.noarch
ovirt-engine-setup-plugin-ovirt-engine-common-3.5.0-0.0.master.20140629172257.git0b16ed7.el6.noarch
ovirt-engine-setup-plugin-websocket-proxy-3.5.0-0.0.master.20140629172257.git0b16ed7.el6.noarch
ovirt-engine-setup-plugin-ovirt-engine-3.5.0-0.0.master.20140629172257.git0b16ed7.el6.noarch

How reproducible:
100%

Steps to Reproduce:
1. (engine host) engine-setup, pidgin style <enter> for everything (just even YES for websocket proxy)
2. (different host) yum install ovirt-engine
3. 'NO' to configure engine, we want just websocket proxy
4. do what you are instruct, just change commands part which have <value>

Actual results:
existing engine's websocket certs will be silently overwritten

Expected results:
for sure it should not overwrite existing cert

Additional info:

(engine)# ls -ltr /etc/pki/ovirt-engine/certs/websocket-proxy.cer 
-rw-r--r--. 1 root root 5359 Jul  3 15:25 /etc/pki/ovirt-engine/certs/websocket-proxy.cer
(engine)# grep websocket-proxy.cer /etc/ovirt-engine/ovirt-websocket-proxy.conf.d/10-setup.conf 
SSL_CERTIFICATE=/etc/pki/ovirt-engine/certs/websocket-proxy.cer
(engine)# ls -l /etc/ovirt-engine/ovirt-websocket-proxy.conf.d/10-setup.conf
-rw-r--r--. 1 root root 251 Jun 19 09:38 /etc/ovirt-engine/ovirt-websocket-proxy.conf.d/10-setup.conf