Fix installing Cassandra schema in devstack
Fix installing Cassandra schema in devstack

Change extends `connection-timeout` and `request-timeout` when
installing Cassandra schema.

Change-Id: I83a51ff92ed5ef2fa123d4bce518071c4d12aa2a
Story: 2001858
Task: 14310

stackforge/monasca-api,openstack/monasca-api,stackforge/monasca-api,openstack/monasca-api,openstack/monasca-api,stackforge/monasca-api,stackforge/monasca-api