Add Gemfile and puppet 4 checks

In anticipation of puppet 4, start trying to deal with puppet 4 things
that can be helpfully predicted by puppet lint plugins. Also fix lint
errors caught by the puppet-lint-absolute_classname-check check as well
as arrow alignment errors that were not being caught by the
system-installed version of puppet-lint before.

Change-Id: I4e6b0df76c0e1b1e9faa9e8884a78ab1e9ab38d7

manifests/init.pp

@@ -37,7 +37,7 @@ class nodepool (
 ) {
 
 
-  class { 'mysql::server':
+  class { '::mysql::server':
     config_hash => {
       'root_password'  => $mysql_root_password,
       'default_engine' => 'InnoDB',
@@ -45,8 +45,8 @@ class nodepool (
     }
   }
 
-  include mysql::server::account_security
-  include mysql::python
+  include ::mysql::server::account_security
+  include ::mysql::python
 
   mysql::db { 'nodepool':
     user     => 'nodepool',
@@ -102,9 +102,9 @@ class nodepool (
     source   => $git_source_repo,
   }
 
-  include diskimage_builder
+  include ::diskimage_builder
 
-  include pip
+  include ::pip
   exec { 'install_nodepool' :
     command     => 'pip install -U /opt/nodepool',
     path        => '/usr/local/bin:/usr/bin:/bin/',
@@ -280,11 +280,11 @@ class nodepool (
 
   if $image_log_document_root != '/var/log/nodepool' {
     file { $image_log_document_root:
-      ensure   => directory,
-      mode     => '0755',
-      owner    => 'nodepool',
-      group    => 'nodepool',
-      require  => [
+      ensure  => directory,
+      mode    => '0755',
+      owner   => 'nodepool',
+      group   => 'nodepool',
+      require => [
         User['nodepool'],
         File['/var/log/nodepool'],
       ],