Fixed conflicts
Added missing files
Working on first test of adding commitment to database
Add DeleteCommitmentController and observer

Signed-off-by: Hui Zheng <fengyimzy@gmail.com>
forgot to add the file
Add method to DeleteCommitmentController and Observer

Signed-off-by: Hui Zheng <fengyimzy@gmail.com>
Modified the result text showed in the DeletCommitmentObserver

Signed-off-by: Hui Zheng <fengyimzy@gmail.com>
Finish DeleteCommitmentRequestObserver V1.0

Signed-off-by: Hui Zheng <fengyimzy@gmail.com>