Fix: AAF timing issues

Fix: AAF timing issues

We wait until the cassandra DB comes up and listen on TCP 9042
before running any cqlsh commands. Also we increse cqlsh
--request-timeout to 60 seconds and in order to prevent
coordinator write timeouts we increase write_request_
timeout_in_ms to 20 seconds. So that Cassandra DB comes up in
all different setpups without any failures.

Change-Id: Idf2e1080a0ec39d6a594888f13625ef173aa5467
Issue-ID: AAF-773
Signed-off-by: kranthi.guttikonda@att.com
Signed-off-by: root <kranthi.guttikonda@att.com>