Disable LB panel by default; allow UUID for Sec Group ID.

A couple fixes for Quantum:

  * The Load Balancers panel is now no longer enabled by
    default since it is disabled by default in Quantum.
  * Security Groups and Security Group Rules now support both
    Nova's integer IDs and Quantum's UUID IDs.
  * Regroups all the Quantum panels into a "Manage Network"
    panel group to match "Manage Compute" above it.
  * Adds tests for both int and UUID ids in the Security
    Group test suite.

Fixes bug 1153477 and fixes bug 1155244.

Change-Id: I2327901634a83f95c5cff4ba91c8c7c32a0ad8af
Merge "Disable LB panel by default; allow UUID for Sec Group ID."