Updated openstack/openstack
Project: openstack/python-troveclient  4643f78a200aff5155e7029dfde0eebe9bef0e70

Correct grammar in trove CLI help

Fixed grammar errors such as 'a instance' and 'the instance' to be
'an instance.'

Change-Id: I43eb9562c5290d23a0def31249d6c7aefd5dc593
Closes-Bug: #1316307