Re-factor vagrant bootstrap
* created new file to hold functions
* moved sections of bootstrap in to functions
* called functions from case statement block
* integrate changes from Andrew Grimberg <agrimberg@linuxfoundation.org> (change 994)
* integrate changes from Ed Warnicke <eaw@cisco.com> (change 996)
* update debian package list after installing PPA
* synchronized redhat package list with VPP Makefile
Change-Id: I3d005c0fe01211c78c8b120b266964d873ee25b7
Signed-off-by: C.J. Adams-Collier <cjac@colliertech.org>