[RFE] Added support for vmware vcenter in packstack

rhbz#1061372

Change-Id: Ifd22019c04037c8be2d0b0b63d6154c6346f32c4
Enable DHCP ports on neutron-dhcp-agent hosts

Change-Id: I7ed387d4ac9a397554b24c3ac318a42af7ed2901
Fixes: rhbz#999695
Merge "Enable DHCP ports on neutron-dhcp-agent hosts"