a few bug fixes eg Metics was already defined in Namespace and debug_append_url was ignored in localtracker

In travis, if minimum required piwik is greater than current version in master, test against master.

Fixing build failure, 4 distinct metrics no longer appear due to bug fix (distinct referrers are 0, so no metric added).

fixed engangement screen which was wrong because of a merge and updated submodule to fix more ui tests

When using testmode in RequestCommand make sure the database connection is re-created and the option data cache cleared. Solved issue where normal database was being used for ArchiveCron test.

The query log is momentarily disabled when the database log handler inserts in database