Declare test stub methods as static to avoid E_STRICT notices

git-svn-id: https://buddypress.svn.wordpress.org/trunk@7504 cdf35c40-ae34-48e0-9cc9-0c9da1808c22
Declare missing $time variable throughout test cases

git-svn-id: https://buddypress.svn.wordpress.org/trunk@7505 cdf35c40-ae34-48e0-9cc9-0c9da1808c22