Use InetAddress for passing Remote Address instead of String
Fix UnitTest ApiServlet
Validate IPv4 address using Apache Commons Validator
Merge remote-tracking branch 'origin/inetaddress'

- Tested locally against unit tests
- TravisCI build passed: https://travis-ci.org/apache/cloudstack/builds/41990351
- Manual QA passed for basic auth and saml auth using default IDP settings

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>

Conflicts:
	server/src/com/cloud/api/ApiServlet.java
CLOUDSTACK-7917: Validating Load Balancer Rule when updating LB + unit test

Signed-off-by: Rajani Karuturi <rajanikaruturi@gmail.com>
(cherry picked from commit c919ff83d81528b89017b5f5731b2e46350e3dfa)
CLOUDSTACK-7915: Remove hard-coded values for Load Balancer algorithms in UI

Signed-off-by: Rajani Karuturi <rajanikaruturi@gmail.com>
(cherry picked from commit ba6dfd84702eeef0362b94068add1328db84133a)
CLOUDSTACK-6465: vmware.reserve.mem is missing from cluster level settings

Signed-off-by: Rajani Karuturi <rajanikaruturi@gmail.com>
(cherry picked from commit eae733817b3670b0151410c027325f78013392ad)