ipatests: python2 does not support f-strings
Adapt the code in ipatests/test_integration/test_otp.py to python2
Related: https://pagure.io/freeipa/issue/9248
Signed-off-by: Florence Blanc-Renaud <flo@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>