Remove non-unicode bind param warnings
Remove non-unicode bind param warnings

The unit test logs currently contain 16 of the following warnings. Use
unicode strings to eliminate these warnings.

    SAWarning: Unicode type received non-unicode bind param value
'<tag>'. (this warning may be suppressed after 10 occurrences)

Change-Id: Ie043a7e37b999c0af56ab8b1a6d055fcbd04e2d3

gooddata/openstack-nova,bigswitch/nova,NeCTAR-RC/nova,hanlind/nova,bigswitch/nova,cloudbase/nova,Juniper/nova,klmitch/nova,mahak/nova,BeyondTheClouds/nova,CEG-FYP-OpenStack/scheduler,hanlind/nova,rajalokan/nova,cyx1231st/nova,klmitch/nova,hanlind/nova,jianghuaw/nova,vmturbo/nova,vmturbo/nova,Juniper/nova,sebrandon1/nova,alaski/nova,Juniper/nova,cernops/nova,jianghuaw/nova,BeyondTheClouds/nova,NeCTAR-RC/nova,phenoxim/nova,jianghuaw/nova,cyx1231st/nova,gooddata/openstack-nova,dims/nova,klmitch/nova,rahulunair/nova,jianghuaw/nova,Juniper/nova,openstack/nova,cernops/nova,phenoxim/nova,sebrandon1/nova,openstack/nova,vmturbo/nova,mikalstill/nova,zhimin711/nova,cernops/nova,sebrandon1/nova,rajalokan/nova,dims/nova,zhimin711/nova,gooddata/openstack-nova,vmturbo/nova,CEG-FYP-OpenStack/scheduler,cloudbase/nova,mahak/nova,mikalstill/nova,cloudbase/nova,rajalokan/nova,rahulunair/nova,klmitch/nova,BeyondTheClouds/nova,rahulunair/nova,rajalokan/nova,openstack/nova,mahak/nova,mikalstill/nova,alaski/nova,gooddata/openstack-nova