Summary of Changes:
- created a generic way for LB rule validations, so as LB device(like Haproxy) specific validations can be done syncronously.
- Removed asyncronous validations from Haproxy and done syncronously.
2) Added elasticIp and elasticLb network capabilities. Provided support to create network offering with these capabilities.
3) Added one more default network offering having elasticip and elasticlb
4) Public network support to Basic zone. You can associate/disassociate IP addresses now