Extend user module, add 'disable user'

This patch adds the user::virtual::disable function to the user module.
This will allow puppet to remove a user, ssh keys, and screen sessions
while preserving the user home directory.

This patch adds future functionality without impacting the currently
configured infrastructure.

Change-Id: I2933e6857094398f86c2a7e6eaabe9898a1d3078

modules/user/manifests/virtual/disable.pp

@@ -0,0 +1,28 @@
+# used to remove a user
+# example:
+#   user::virtual::disable { 'baduser': }
+
+define user::virtual::disable(
+) {
+  $username = $title
+  #1. Remove user
+  exec { "disable_${username}":
+    command => "userdel ${username}",
+    onlyif  => "grep ^${username}: /etc/passwd",
+  }
+  #2. remove sshkeys file(s)
+  file { "rm_authorized_keys_${username}":
+    ensure  => absent,
+    path    => "/home/${username}/.ssh/authorized_keys",
+  }
+  file { "rm_authorized_keys2_${username}":
+    ensure  => absent,
+    path    => "/home/${username}/.ssh/authorized_keys2",
+  }
+  #3. rm screen dir (just in case)
+  exec { "rm_screen_${username}":
+    command => "rm -rf /var/run/screen/S-${username}",
+    onlyif  => "ls /var/run/screen/S-${username}",
+  }
+}
+