test(tooltip): add test for service option 'show'
test(tooltip): add resource allocation tests

Add function countScopes() to the test/helpers.js that allows counting the number of existing scopes.
Add some basic allocation tests to tooltip to check the number of created scopes.
test(datepicker): add resource allocation tests
fix(datepicker): fix scope leak when opening picker multiple times

Prevents creation of scopes each time datepicker is shown by using a new scope for the tipElement in tooltip service, which in the basis for the datepicker. This new scope is destroyed when the tip is hidden, thereby cleaning up resources.
Had to change other tooltip based directives custom event hook-up in show() to use $timeout instead of setTimeout to prevent errors, by delaying code execution inside the $digest cycle.
test(timepicker): add resource allocation tests
test(dropdown): add resource allocation tests
chore: remove unnecessary timeouts to hookup events

Toolip derived directives that use custom show/hide functions were using a timeout to hookup events after calling base show(), which is not necessary.
chore(karma): turn off singleRun karma:server
test(timepicker): trigger focus correctly