Add two new utility modules
- keystone.common.base64utils
- keystone.common.pemutils
Add two new unit tests to exercise the above.
- keystone.tests.test_base64utils
- keystone.tests.test_pemutils
Functionality in these utilities will be utilized to fix bug #1233838
in a subsequent commit. It is hoped these modules will moved to Oslo
common code. Each module has a doc string describing their purpose and
functionalty.
Change-Id: I3546674dcd9eddec2c378929dd3f759f667cfd5d
Partial-Bug: #1233838