qa/common.rpm: add more diags, failure goes away
qa/common.rpm: add more diags, failure goes away

qa/750 is a regular failure on vm24.  Adding these diagnostics
(that run rpm -qa a couple of extra times) makes the test pass.
Heisenbug strikes again.

wuliming/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,wuliming/pcp,wuliming/pcp,wuliming/pcp,adfernandes/pcp,adfernandes/pcp,wuliming/pcp,adfernandes/pcp,wuliming/pcp,wuliming/pcp,wuliming/pcp