Use ADDITIONAL_ARGS to pass extra commands to Packstack scenarios

This is a generic variable that'll allow to pass extra commands to
Packstack integration testing scenarios so that we do not have to
parameterize everything and extend testing easily if required.

For example, this will allow testing frameworks to send the extra
argument "--enable-rdo-testing=y" in order to test Packstack against
the testing repositories.

Change-Id: I5b510aabe6749e329b19ef178e6b8870ee66c1a7

run_tests.sh

@@ -23,10 +23,10 @@ MANAGE_REPOS=${MANAGE_REPOS:-true}
 DELOREAN=${DELOREAN:-http://trunk.rdoproject.org/centos7-newton/current-passed-ci/delorean.repo}
 DELOREAN_DEPS=${DELOREAN_DEPS:-http://trunk.rdoproject.org/centos7-newton/delorean-deps.repo}
 GIT_BASE_URL=${GIT_BASE_URL:-git://git.openstack.org}
+ADDITIONAL_ARGS=${ADDITIONAL_ARGS:-}
 # If logs should be retrieved automatically
 COPY_LOGS=${COPY_LOGS:-true}
 
-
 # Install external Puppet modules with r10k
 # Uses the following variables:
 #

tests/scenario001.sh

@@ -15,7 +15,8 @@ echo -e "Generating packstack config for:
 echo "tempest will run if packstack's installation completes successfully."
 echo
 
-$SUDO packstack --allinone \
+$SUDO packstack "${ADDITIONAL_ARGS}" \
+          --allinone \
           --debug \
           --service-workers=2 \
           --default-password="packstack" \

tests/scenario002.sh

@@ -16,7 +16,8 @@ echo -e "Generating packstack config for:
 echo "tempest will run if packstack's installation completes successfully."
 echo
 
-$SUDO packstack --allinone \
+$SUDO packstack "${ADDITIONAL_ARGS}" \
+          --allinone \
           --debug \
           --service-workers=2 \
           --default-password="packstack" \

tests/scenario003.sh

@@ -16,7 +16,8 @@ echo -e "Generating packstack config for:
 echo "tempest will run if packstack's installation completes successfully."
 echo
 
-$SUDO packstack --allinone \
+$SUDO packstack "${ADDITIONAL_ARGS}" \
+          --allinone \
           --debug \
           --service-workers=2 \
           --default-password="packstack" \