Fix selenium tests after changes in UI

-Fix UI locators due to latest changes
-Fix test logic according to UI changes
-Remove outdated tests

Closes-Bug: #1377829

Change-Id: I8e6a52f1d75f6a6f5bae1d9202deeb31f8674b9e
Increase timeout of waiting the service in check_ceph_status()

Two minutes is not enough for starting ceph service during our
destructive tests, especially in case of some failures.

Change-Id: I892cf7596584ef829475fd6583e869a5109bc1d6
Related-Bug: #1318638
Add retry() decorator to sync admin
time method

Change-Id: I6a034fc9dca42401e57e9074a2e7213d4b54502f
Related-Bug: #1383351
Adapt postgres container to postgresql 9.3

Binary and config paths are dependent on postgresql package
version. Adapted postgres to work with newer versions, but
left older configurations available in case paths change
back to the previous format.

Change-Id: I33de52e1b285c83d704f42909e86e49111e24ca6
Partial-Bug: #1386118
Merge "Adapt postgres container to postgresql 9.3"
Merge "Add retry() decorator to sync admin time method"
Merge "Fix selenium tests after changes in UI"