changes to unit tests

an changed to "a"
sqlite to SQLite
text plural changed

Change-Id: I76aa0ddcca02a1c2cbe2eceec5469d4d57bf9f89
changes to module001-ch004-openstack-architecture

SQlite to SQLite
capitalize keystone

Change-Id: I6fc51a329a857735f8288020e0195ce7571b7585
Merge "changes to module001-ch004-openstack-architecture"
Merge "changes to unit tests"