history: changed vm ip cloumn to text (#953148)

This is to match the engine type and allow almost unlimited ip
amount per vm.

Bug-Url: https://bugzilla.redhat.com/953148

Change-Id: Ifdf493916b22cd53fc36b36ec128add43e655941
Signed-off-by: Yaniv Dary <ydary@redhat.com>