In test_bp_group_has_members_vanilla(), do exclude_admins_mods = false

This helps to avoid errors when running the test suite in a certain order

git-svn-id: https://buddypress.svn.wordpress.org/trunk@7124 cdf35c40-ae34-48e0-9cc9-0c9da1808c22
Another exclude_admins_mods declaration in bp_group_has_members() tests

This helps to avoid failures when running the tests in a certain order on
multisite.

git-svn-id: https://buddypress.svn.wordpress.org/trunk@7125 cdf35c40-ae34-48e0-9cc9-0c9da1808c22