Stop using mocha on configuration_test
Set the application logger using configuration
Stop using mocha on console_test
Stop using mocha on dbconsole_test
Stop requiring mocha automatically

We are planning to remove mocha from our test suite because of
performance problems. To make this possible we should stop require mocha
on ActionSupport::TestCase.

This should not affect applications since users still need to add mocha
to Gemfile and this already load mocha.

Added FIXME notes to place that still need mocha removal