Staged upgrade for npm

The version of npm that ships with trusty is able to upgrade itself
to npm v2, but cannot upgrade to npm v3. Furthermore, performing
a staged upgrade picks up the default `profile` parameter from
npm, so that value has to be overridden globally in order to ensure
that /usr/bin is not polluted.

This patch adds the following:
- A staged upgrade step, triggered when the detected version of npm
  is "1", to upgrade to version 2.
- A new global npmrc configuration file, containing the profile setting.
- Renamed jenkins/global npmrc templates.

Values that made more sense to keep globally have been moved there.

Change-Id: Ia633ccabb49d74a10c904a6e8ba73945d77fb32d

modules/openstack_project/manifests/release_slave.pp

@@ -55,13 +55,26 @@ class openstack_project::release_slave (
 
   package { ['nodejs', 'nodejs-legacy', 'npm']:
     ensure => latest,
-    before => Exec['upgrade npm'],
+    before => [
+      Exec['upgrade npm']
+    ]
+  }
+
+  exec { 'assert npm@2':
+    command  => 'npm install npm@2 -g --upgrade',
+    path     => '/usr/local/bin:/usr/bin',
+    onlyif   => '[ `npm --version | cut -c 1` = "1" ]',
+    require  => [
+      Package['npm'],
+      File['/etc/npmrc'],
+    ],
   }
 
   exec { 'upgrade npm':
     command  => 'npm install npm -g --upgrade',
     path     => '/usr/local/bin:/usr/bin',
-    onlyif   => '[ `npm view npm version` != `npm --version` ]'
+    onlyif   => '[ `npm view npm version` != `npm --version` ]',
+    require  => Exec['assert npm@2'],
   }
 
   file { '/home/jenkins/.pypirc':
@@ -78,10 +91,18 @@ class openstack_project::release_slave (
     owner   => 'jenkins',
     group   => 'jenkins',
     mode    => '0600',
-    content => template('openstack_project/npmrc.erb'),
+    content => template('openstack_project/npmrc_jenkins.erb'),
     require => File['/home/jenkins'],
   }
 
+  file { '/etc/npmrc':
+    ensure  => present,
+    owner   => 'root',
+    group   => 'root',
+    mode    => '0666',
+    content => template('openstack_project/npmrc_global.erb'),
+  }
+
   file { '/home/jenkins/.jenkinsci-curl':
     ensure  => present,
     owner   => 'jenkins',

modules/openstack_project/templates/npmrc_global.erb

@@ -0,0 +1,3 @@
+tag-version-prefix=
+sign-git-tag=true
+prefix=/usr/local

modules/openstack_project/templates/npmrc_jenkins.erb

@@ -4,8 +4,6 @@
 init.author.name=<%= jenkins_gitfullname %>
 init.author.email=<%= jenkins_gitemail %>
 init.author.url=<%= npm_userurl %>
-tag-version-prefix=
-sign-git-tag=true
 
 //registry.npmjs.org/:username=<%= npm_username %>
 //registry.npmjs.org/:_password=<%= Base64.encode64(npm_userpassword) %>