avaya_fa: added support for avaya fabric-attach tlvs

added autoconf ./configure option --enable-avaya_fa and preprosessor #define ENABLE_AVAYA_FA
for conditional compile on fabric attach code.
added structures and constants for defining fabric attach tlvs, and
augmented the lldp send/decode functions to process these new tlvs
avaya_fa: code review changes
avaya_fa: added some info logging, fixed Avaya OUI #define

logging added for displaying relevent information upon receipt of packet
containing avaya tlvs.
avaya_fa: Added #defines for the different device types of elements for
the discovery tlvs (e.g., server, proxy, tagged client, etc.)
avaya_fa: fixed issue in lldp_send() where bits were being sent in the
wrong order
(cherry picked from commit 86466334fd15e019af734fc7eedd7e8fcf119c46)
avaya_fa: changes to tlv fundamentals

-removed msg_digest from the tlv structure as it gets computed when the
packet is sent and is useless to store

-changed transmittal of fa isid vlan mappings so that they'll get added
back-to-back in a single tlv instead of one tlv per mapping

-added #defines for additional avaya tlv properties
avaya_fa: fixed lldp_decode of multiple mappings, added new system_id
support
avaya_fa: merged lldp FA related code changes from the FA-OVS project
aa-sdk: added additional code changes for AA-SDK
Initial commit
Merge remote-tracking branch 'lldpd/master'

Conflicts:
	README.md
aasdk: fixed some build errors
aa-sdk: turned off some compiler flags in configure.ac
aa-sdk: changes from code review
Merge branch 'master' of /opt/corp/projects/sdn/git-repos/github-aa-lldpd
Merge remote-tracking branch 'github-aa-lldpd/master' into integration

Conflicts:
	src/daemon/lldpd.c