Router flavor metainfo defines syslog settings in following format:
'syslog':{'server_ip':'<ip>','server2_ip':'<ip>','protocol':'[tcp|udp]'
server2_ip and protocol are optional.
This configuration is not stored on router. Instead, after edge allocation,
flavor metainfo is queried and edge is updated accordingly.
Limitations for shared routers: since several shared routers can share same
edge, each new router association will override syslog settings on the edge.
In addition, due to delayed nature of edge allocation, syslog settings will
reflect flavor metadata at point of port creation (metadata might have changed
since router creation)
Change-Id: I5e38c7391812c5747e9e4475e0bb50f107e872b6
2423d139d3