These tests should not be included as required tests since they all
need second set of credentials.
Remove images-v2-share as a required capability because sharing
inherently requires more than one credential.
Drop images-v2-remove since this capability will have no test
after removal of tests that require second set of credential.
Change-Id: Ie7b0fb4f4c2be8ff5d7c683b9d7defc5b2f9ee3a