Updating Dbaas initializer default arguments.
Updating Dbaas initializer default arguments.

Specifically, the service name and type values are changed to reflect
their new values in the CLI tool.

Fixed bug #1131058

Change-Id: I86530e655f0bfed09956654324f29587a7df8f2c

citrix-openstack-build/python-troveclient,openstack/python-troveclient,cp16net/python-troveclient,citrix-openstack-build/python-troveclient,metacloud/python-troveclient,Tesora/tesora-python-troveclient,Tesora/tesora-python-troveclient,citrix-openstack/build-python-troveclient,cp16net/python-troveclient,metacloud/python-troveclient,citrix-openstack/build-python-troveclient,openstack/python-troveclient