Moves common logging/reporting code from unittest to common.

 * Creates FixtureReporter that can be used by
   any testing framework to support cafe-style logging and reporting.
 * Refactors unittest BaseTestFixture to use new FixtureReporter
 * Refactors cclogging to add init_root_log_handler() and
   log_info_block() methods to help make logging more uniform.

Change-Id: I6c258fc96e07b087dc2d2304d201382f8fb29b84
Merge "Moves common logging/reporting code from unittest to common."