CB-6965. Port notification tests to test-framework

Ported notification test from mobilespec to the new test-framework in
jasmine 2.0
Added test folder.
Added tests.js file inside the test folder.
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/cordova-plugin-dialogs into HEAD
CB-6965 Added manual tests
Renamed test dir, added nested plugin.xml
Merge branch 'CB-6965' of https://github.com/stacic/cordova-plugin-dialogs