Remove commented line in update_service_test

Signed-off-by: Derek Richard <drichard@pivotal.io>
Allows mutliple plugins with blank aliases.

[Finishes #84241752]

Signed-off-by: Simon Leung <leungs@us.ibm.com>
Allows plugin to be installed from an Url

[finishes #80043644]

Signed-off-by: Jonathan Berkhahn <jaberkha@us.ibm.com>