Delete old TODOs related to v2 switchover

Delete some old TODO comments that are obsolete now that the default
cartridge model has been changed to v2.
<node-proxy,port-proxy> Bug 964212 - Fix init script dependencies

https://bugzilla.redhat.com/show_bug.cgi?id=964212

Add INIT INFO to node-proxy and port-proxy to make sure required
services are started before init scripts are called during startup

Fix references to port-proxy in node-proxy init script
online_runtime_296 - No longer need to move the throttle tag.
Bug 964347 - Run cartridge scripts from cartridge home directory

* Refactored platform code to run cartridge scripts from cartridge home directory
* Added missing step in mongodb cucumber tests
Merge pull request #2583 from Miciah/drop-todo-for-v2-switchover

Merged by openshift-bot
Merge pull request #2591 from detiber/bz964212

Merged by openshift-bot
Merge pull request #2617 from rmillner/online_runtime_296

Merged by openshift-bot
Merge pull request #2612 from jwhonce/bug/964347

Merged by openshift-bot