CLOUDIFY-2048 import VAGRANT_MACHINE_IP from init
CLOUDIFY-2048 some refactoring. move shared data to init
CLOUDIFY-2048 added shared maps to init to be used by all tests
CLOUDIFY-2048 added cosmo-celery-common to dependencies for some constants
CLOUDIFY-2048 added support for installing agent under virtualenv
CLOUDIFY-2048 added test for virtualenv