packaging: update version of postgresql driver

For some reason the 9.1-901.jdbc4 downloads 9.0 driver, may be a
problem in maven mirrors, as download directly from search downloads
currect version.

9.1-901-1.jdbc4 works correctly.

Change-Id: I8e59d1de684f70539385637a1a03efb4b4a8c701
Signed-off-by: Alon Bar-Lev <alonbl@redhat.com>