Don't run syncdb or migrate until after install

The syncdb and migrate execs need an upgraded Askbot package
installed in the venv before they're run, so indicate this
dependency relationship accordingly.

Change-Id: Ibf191682e238fcf5dcebc5a5c2c50d8b63913153

manifests/install.pp

@@ -117,6 +117,7 @@ class askbot::install (
     cwd         => "${dist_root}/askbot",
     command     => '/usr/askbot-env/bin/pip install .',
     logoutput   => on_failure,
+    before      => [Exec['askbot-syncdb'], Exec['askbot-migrate'] ],
     subscribe   => Git['askbot'],
     refreshonly => true,
     require     => Exec[ 'pip-requirements-install'],