Description of problem:
If the cluster has several Operator Group like “test1”, “test2” and the ordinary  “global-operators”The operators on the Marketplace UI like “etcd” can be enabled to Operator Group “test1”, and enabled to “test2”,then enabled to “global-operators”. Then the “enabled” label will add to the etcd operator’s tile and the enable button will be gray on the detail page. 
If enable “etcd” to OG “global-operators” at first, then the the “enabled” label will add to the etcd operator’s tile and the enable button will be gray on the detail page. The operator “etcd” won’t be enabled to OG “test1”, “test2”. 

Version-Release number of selected component (if applicable):
cluster version: 4.0.0-0.alpha-2019-01-06-163602 
MARKETPLECE: latest

How reproducible:
Always

Steps to Reproduce:
1. enable the operator “etcd” to OG “test1” through Marketplace UI

Actual results:
1) after step 1, the operator “etcd” can be enabled to other OG through Marketplace UI

Expected results:
1)after step 1, the operator “etcd” can’t be enabled to other OG through Marketplace UI

Additional info:
You can still click the subscribe button on the detail page of operator "etcd" to OG "test1" even it has already been subscribed to OG "test1". And nothing will happen, the page won't prompt that the operator has already been subscribeb to OG "test1".