Increasing the OS_TEST_TIMEOUT to 90s
Increasing the OS_TEST_TIMEOUT to 90s

Giving the test more time to complete should reduce
the failure rate for networking-l2gw

Change-Id: I190e2607fbf817e0fe1d1bfe37c9e7c16230d3db
Closes-Bug: #1486156

openstack/networking-l2gw,openstack/networking-l2gw