Description of problem:

While adding additional HE host, the events pane in the RHV-M portal will show below error log.

Failed to install Host. HA client was not imported.

However, the installation will proceed fine and HE host will be deployed successfully. The error occurs only with RHEL host since ovirt-hosted-engine-ha package will only be installed during the deployment process. 

It will not happen with RHV-H since ovirt-hosted-engine-ha will be pre-installed in RHV-H and hence client module will be always available.

Relavent logs.

====
2017-11-13 21:49:02,717+05 INFO  [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (VdsDeploy) [2f7f70f5] EVENT_ID: VDS_INSTALL_IN_PROGRESS(509), Correlation ID: 2f7f70f5, Call Stack: null, Custom ID: null, Custom Event ID: -1, Message: Installing Host . Yum Verify: 6/6: ovirt-hosted-engine-ha.noarch 0:2.1.7-1.el7ev - u.
2017-11-13 21:49:03,606+05 ERROR [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (VdsDeploy) [2f7f70f5] EVENT_ID: VDS_INSTALL_IN_PROGRESS_ERROR(511), Correlation ID: 2f7f70f5, Call Stack: null, Custom ID: null, Custom Event ID: -1, Message: Failed to install Host . HA client was not imported.
====


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

ovirt-host-deploy-1.6.7-1.el7ev.noarch
rhevm-4.1.7.6-0.1.el7.noarch

How reproducible:

100%

Steps to Reproduce:

1. Add an additional HE RHEL host and watch the events tab. Make sure that host is not having the ovirt-hosted-engine-ha before adding to RHV-M.


Actual results:

Misleading error message as "Failed to install Host" which confuses users.

Expected results:
 

Additional info: