Add tox environement for ansible check syntax

This commits adds tox environments for checking the lampstack ansible
syntax.

Change-Id: Ia333d222ffb4b10caad1c55ea58b771865cd8de2

tox.ini

@@ -13,6 +13,7 @@ setenv =
     ANSIBLE_SSH_CONTROL_PATH = /tmp/%%h-%%r
     ANSIBLE_INVENTORY = {env:LAMPSTACK_DIR}/hosts
     ANSIBLE_CONFIG = {env:LAMPSTACK_DIR}/ansible.cfg
+    ANSIBLE_LOCAL_TEMP = {envtmpdir}
 deps =
     setuptools
     -r{toxinidir}/ansible_requirements.txt
@@ -27,3 +28,9 @@ setenv =
     {[testenv]setenv}
     ANSIBLE_CALLBACK_WHITELIST = profile_tasks
 commands = ansible-playbook -vvv -e "action=apply {posargs}" {env:LAMPSTACK_DIR}/site.yml
+
+[testenv:lampstack-syntax]
+setenv =
+  {[testenv]setenv}
+commands = ansible-playbook -vvv --syntax-check {env:LAMPSTACK_DIR}/site.yml -e "action=apply {posargs}"
+           ansible-playbook -vvv --syntax-check {env:LAMPSTACK_DIR}/site.yml -e "action=destroy {posargs}"