singlevm: Add variable for keystone wait time
singlevm: Add variable for keystone wait time

Adds a variable to hold the maximum amount of time to wait for keystone
to start, and emits a message to inform the user.

Signed-off-by: Brett T. Warden <3c49f16b9d4a3f688e955241c679cb8951e4845a@intel.com>

tpepper/ciao,erick0z/ciao,obedmr/ciao,mrkz/ciao,mrkz/ciao,erick0z/ciao,markdryan/ciao,erick0z/ciao,mcastelino/ciao,kaccardi/ciao,kaccardi/ciao,mrkz/ciao,tpepper/ciao,01org/ciao,tpepper/ciao,ciao-project/ciao,matthewrsj/ciao,rbradford/ciao,mcastelino/ciao,rbradford/ciao,wcwxyz/ciao,matthewrsj/ciao,obedmr/ciao,wcwxyz/ciao,01org/ciao,wcwxyz/ciao,obedmr/ciao,markdryan/ciao,matthewrsj/ciao,ciao-project/ciao,mcastelino/ciao