test: Add -cilium.provision flag
test: Add -cilium.provision flag

Reprovisioning the vagrant VMs, or even just recompiling Cilium, may
take some time and sometimes developers don't need to deploy a new
version of the actual running code, for example while trying test
modifications. This patch adds the "-cilium.provision" flag, which, when
set to false, will skip (re)provisioning the vagrant VM. Note that the
vagrant boxes must be provisioned already and running for this flag to
work as intended.

Usage:
$ cd test/
$ ginkgo -- -cilium.provision=false

Signed-off-by: Joe Stringer <16a9a54ddf4259952e3c118c763138e83693d7fd@covalent.io>

cilium-team/cilium,scanf/cilium,cilium/cilium,michi-covalent/cilium,tgraf/cilium,scanf/cilium,cilium/cilium,michi-covalent/cilium,eloycoto/cilium,tklauser/cilium,cilium-team/cilium,tgraf/cilium,cilium/cilium,eloycoto/cilium,scanf/cilium,scanf/cilium,scanf/cilium,tgraf/cilium,cilium/cilium,tklauser/cilium,eloycoto/cilium,eloycoto/cilium,tklauser/cilium,cilium/cilium,scanf/cilium,michi-covalent/cilium,michi-covalent/cilium,eloycoto/cilium,tgraf/cilium,tklauser/cilium,eloycoto/cilium,tgraf/cilium,michi-covalent/cilium,tgraf/cilium,tklauser/cilium,scanf/cilium,eloycoto/cilium