iBGP performance suites against many fastbgp peers

iBGP performance suites against many fastbgp peers

- No half with ODL initiating connections as ODL configuration is slow.
- Peers need segment of bindable IP addresses.
- Still only iBGP peer roles used.
- Default multiplicity is 2, to avoid Bug 4488.

+ BGP functional suites changed to use template with configurable peer name.
+ Manager utility for starting multiple play.py processes.
+ BGPSpeaker Resource supports this Manager.
+ New suites added to existing ingest testplan.
+ play.py uses double quotes for string literals.
+ Configurable BGPCEP log level (useful for Bug 4488 investigation).
+ Assure Keywords moved to SSHKeywords, throughpcep suite updated for that.

Change-Id: I03faec4f209a3c657cbd3045d01b066789a0b35f
Signed-off-by: Vratko Polak <vrpolak@cisco.com>