Moving following projects to wsl-mule-usecases directory

1.example-on-mule-context-notification
2.example-on-mule-interceptor

Signed-off-by: rafiqmohammad <rafiq.mohammad@whiteskylabs.com>
Merge pull request #9 from kalyanwsl/MasterCleanUp

Moving following projects to wsl-mule-usecases directory