Support Deactivate PDP Context Request from network

Enable Deactivate PDP context based on the IMSI of the subscriber.
When there are PDP contexts present for a MM context,
PDP context will be deactivated along with GMM Detach(MM context deletion).
If there are no PDP present, MM context will be deleted to avoid
further PDP context request from the MS.
Test cases is added to check this functionality.

Change-Id: Ia0a41aa2218ec2fda4ea17a37c8cc55cba63dd13
4 files changed
tree: 9639b03380f63d70f50f8cbdcf2902999bbce7c9
  1. contrib/
  2. debian/
  3. openbsc/
  4. .gitignore
  5. .gitreview
  6. .mailmap