Revert "Vinod, Mewan |#2271| Removing code related to alternate contact number as it will be in a separate release"

This reverts commit 492ce8249d5aa41a81d870bd6930bca24530df3a.
Vinod, Mewan |#2298| Storing alternate contact number and synching for Contact Centre API
Vinod, Mewan |#2298| Validate mandatory alternate contact number for Success registration
Sync liquibase number with deploy
Mewan, Vinod | #2298 | Validations for alternate contact number
Merge branch 'enhancements' into enhancements2
Fixing compilation errors due to merge
Mewan, Vinod | # 2300 | Fixing error CSV serializaiton to include alternate contact number
Merge branch 'enhancements' into enhancements2
Merge branch 'enhancements' into enhancements2 with the bug fixes
Mewan, Vinod | #2324 | Adding new field Change Msisdn to Registration Request
Mewan, Vinod | #2324 | Adding validation to the newMsisdn field
Mewan, Vinod |#2324| Adding validations for Invalid/Others wrt to newMsisdn
Mewan, Vinod |#0| merge enhancements with enhancements2
Vinod, Mewan |#2337| Fixed order of validations for change msisdn
Merge with 'enhancements'
Mewan, Vinod | #2325 | Handling change msisdn request
Vinod,Mewan |#2325| Added service unit and integration tests for change msisdn and flwId validations for change msisdn request
Mewan, Vinod | #2325 | Refactoring tests, more validations
Mewan, Vinod | #2325 | Fixing validations