Remove exits in OpenStack client utils

It prevents openstack_utils from exiting when the mandatory env vars
are unset. Every testcase is now in charge of handling the exception
MissingEnvVar.

JIRA: FUNCTEST-438

Change-Id: I0e321b544a470c1f2f2fa62b3e061fe5f938e112
Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/utils/openstack_utils.py b/utils/openstack_utils.py
index e0da7d97d..39594a2a9 100755
--- a/utils/openstack_utils.py
+++ b/utils/openstack_utils.py
@@ -28,6 +28,15 @@ logger = ft_logger.Logger("openstack_utils").getLogger()
 # *********************************************
 #   CREDENTIALS
 # *********************************************
+class MissingEnvVar(Exception):
+
+    def __init__(self, var):
+        self.var = var
+
+    def __str__(self):
+        return str.format("Please set the mandatory env var: {}", self.var)
+
+
 def check_credentials():
     """
     Check if the OpenStack credentials (openrc) are sourced
@@ -51,8 +60,7 @@ def get_credentials(service):
     envvars = ('OS_USERNAME', 'OS_PASSWORD', 'OS_AUTH_URL', 'OS_TENANT_NAME')
     for envvar in envvars:
         if os.getenv(envvar) is None:
-            logger.error("'%s' is not exported as an env variable." % envvar)
-            exit(-1)
+            raise MissingEnvVar(envvar)
 
     # Unfortunately, each of the OpenStack client will request slightly
     # different entries in their credentials dict.