Fix puppet-apply tests

Puppet is now throwing an error about this for centos-7 unit tests.

Add empty SSH key for krotscheck.

We also need to make sure puppet has been properly installed, this is
because we have recently removed puppet from our diskimages.

Change-Id: I8bcaddd045be3f81de5c2481e0de6a8526c97a91
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

modules/openstack_project/manifests/users.pp

@@ -185,6 +185,7 @@ class openstack_project::users {
 
   @user::virtual::localuser { 'krotscheck':
     realname => 'Michael Krotscheck',
+    sshkeys  => '',
     uid      => 2020,
     gid      => 2020,
   }

tools/prep-apply.sh

@@ -43,6 +43,8 @@ declare -A INTEGRATION_MODULES
 
 source $MODULE_ENV_FILE
 
+# Install puppet
+sudo -E bash -x $ROOT/install_puppet.sh
 # Install SOURCE_MODULES
 sudo -E bash -x $ROOT/install_modules.sh