tests: make tests less make dependent

Implement command line argument parsing instead of passing arguments via
environment variables. Add script for running tests without having to
invoke make. Deprecate running tests via make.

Type: improvement
Change-Id: I2e3054a61a2ae25d460e9be00be7d7705fbf943e
Signed-off-by: Klement Sekera <ksekera@cisco.com>
Signed-off-by: Dave Wallace <dwallacelf@gmail.com>

test/vpp_papi_provider.py

@@ -10,6 +10,7 @@ import time
 from collections import deque
 import queue
 from six import moves, iteritems
+from config import config
 from vpp_papi import VPPApiClient, mac_pton
 from hook import Hook
 from vpp_ip_route import MPLS_IETF_MAX_LABEL, MPLS_LABEL_INVALID
@@ -135,7 +136,7 @@ class VppPapiProvider(object):
 
         # install_dir is a class attribute. We need to set it before
         # calling the constructor.
-        VPPApiClient.apidir = os.getenv('VPP_INSTALL_PATH')
+        VPPApiClient.apidir = config.vpp_install_dir
 
         self.vpp = VPPApiClient(logger=test_class.logger,
                                 read_timeout=read_timeout,