mock fails with error "DEBUG: error: python callback <bound method RPMTransaction.callback of <yum.rpmtrans.RPMTransaction instance at 0x3974200>> failed, aborting!"

Issue

• mock fails with error:

DEBUG: Traceback (most recent call last):
DEBUG:   File "/usr/lib/python2.6/site-packages/yum/rpmtrans.py", line 407, in callback
DEBUG:   File "/usr/lib/python2.6/site-packages/yum/rpmtrans.py", line 511, in _unInstStop
DEBUG:   File "/usr/lib/python2.6/site-packages/yum/rpmtrans.py", line 258, in _scriptout
DEBUG:   File "/usr/lib/python2.6/site-packages/yum/history.py", line 972, in log_scriptlet_output
DEBUG:   File "/usr/lib/python2.6/site-packages/yum/sqlutils.py", line 168, in executeSQLQmark
DEBUG: sqlite3.OperationalError: unable to open database file
DEBUG: error: python callback <bound method RPMTransaction.callback of <yum.rpmtrans.RPMTransaction instance at 0x3974200>> failed, aborting!
DEBUG: /var/lib/mock/rhel/root/var/lib/rpm: No such file or directory
DEBUG: Child return code was: 1