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"