Add 'rm -f .testrepository/times.dbm' command in testenv
Add 'rm -f .testrepository/times.dbm' command in testenv

Running py2* post py3* tests results in error. Add
'rm -f .testrepository/times.dbm' command in testenv to
resolve this.

Change-Id: I892d8b2e5a5488418eebf17129828aaf854b9f14

openstack/solum,stackforge/solum,stackforge/solum,openstack/solum