Integration jobs: Increase default swap size

This change increases default swap size, installed by the run-test.sh
script, from 4GiB to 8GiB, because now we see frequent failures caused
by memory shortage.

This removes the separate ansible task to create an additional swap
space (added by f4429e07d8b5afd9ff46ca907d6b7c18b9e7f93d ) because now
the enough amount is created by run-test.sh.

Change-Id: I24ebef234c79e636b24e47535732aea74e52a241

playbooks/prepare-node-integration.yaml

@@ -42,12 +42,3 @@
           EOF
       environment:
         GEM_HOME: "{{ ansible_user_dir }}/workspace/puppet-openstack-integration/.bundled_gems"
-
-    - name: Prepare swap
-      shell:
-        cmd: |
-          dd if=/dev/zero of=/tmp/swapfile bs=1GiB count=4 && \
-          chmod 0600 /tmp/swapfile && \
-          mkswap /tmp/swapfile && \
-          swapon /tmp/swapfile
-      become: yes

run_tests.sh

@@ -23,7 +23,7 @@ export SCENARIO=${SCENARIO:-scenario001}
 export MANAGE_PUPPET_MODULES=${MANAGE_PUPPET_MODULES:-true}
 export MANAGE_REPOS=${MANAGE_REPOS:-true}
 export ADD_SWAP=${ADD_SWAP:-true}
-export SWAP_SIZE_GB=${SWAP_SIZE_GB:-4}
+export SWAP_SIZE_GB=${SWAP_SIZE_GB:-8}
 export HIERA_CONFIG=${HIERA_CONFIG:-${SCRIPT_DIR}/hiera.yaml}
 export MANAGE_HIERA=${MANAGE_HIERA:-true}
 export PUPPET_ARGS="${PUPPET_ARGS} --detailed-exitcodes --color=false --test --summarize --trace --hiera_config ${HIERA_CONFIG} --logdest ${WORKSPACE}/puppet.log"