CLOUDSTACK-747: internalLb in VPC - UI - create network offering - when VPC checkbox is checked, enable provider InternalLbVm, VpcVirtualRouter, Netscaler. When VPC checkbox is unchecked, disable provider InternalLbVm, VpcVirtualRouter.
CLOUDSTACK-747: internalLb in VPC - UI - create network offering - when Lb service is checked and LB provider is InternalLbVm, pass capability type as lbSchemes and capability value as internal.