fix TC_pdp4_act_deact_with_separate_dns

Do not delete the PDP context too early, and look for the second DNS
server in the correct place (2nd match on IPCP protocol, not 1st).

Update a comment which talks about a bug which has been fixed.

Change-Id: I109491cc9ccb060792e29bf6b2999ef48723edbf
Related: OS#3319
Related: OS#3381
1 file changed