storage: Removed storage re-initialization on failure
storage: Removed storage re-initialization on failure

As systemd restarts the agent (with proper timeouts) after
a failure, it is enough now to initialize storage only at start,
validate it's avaiability during monitoring and just fail with
storage.

Change-Id: Ibca2ac7efe6c38a5a3b3c648b48eef09f5f77a14
Bug-Url: https://bugzilla.redhat.com/1378310
Signed-off-by: Denis Chaplygin <c9765bc4e17067a9b371ba0697b416c9f2022720@redhat.com>

oVirt/ovirt-hosted-engine-ha,oVirt/ovirt-hosted-engine-ha,oVirt/ovirt-hosted-engine-ha,oVirt/ovirt-hosted-engine-ha