Updating tempest config, in order for it to match Havana release functionality
	- tempest.conf.erb template was updated.
	- config.rb recipe was updated, in order for tempest to locate cli_dir for both PFS and nonPFS installation scenarios
send stdout to stderr
Actualizing requirements
Adding deps for correct work of pythin virtual-env and tox
redhat/centos support
preparing ec2 and s3 test suite
keep tempest operational in case of non-pfs
cleanup and fix install.rb
update crowbar.yml according to pip_reqs
fix venv