FABC-563 Update Postgres version to 9.6 in s390x
FABC-563 Update Postgres version to 9.6 in s390x

Upgrade postgres version to 9.6 in s390x and keep
9.5 in x86

Change-Id: I2d3e2c416657deb87e8880e825de4d540fe1bb51
Signed-off-by: rameshthoomu <1e6b86b1c013461e7a60f449583642b87c2b3c3b@gmail.com>

saadk10/fabric-ca,saadk10/fabric-ca