fixup! NXD lib/tasks/gitlab/check: Exit with non-zero code, if something failed in a check task

Colorize gem was replaced with Rainbow, so we fix patched tasks check to work with the new module.

lib/tasks/gitlab/check.rake

+require 'rainbow'
 # if we ever print anything in red - that's an error
 $check_failed = false
-class String
-  alias_method :orig_color, :color
-  def color(code)
-    if code == :red
-      $check_failed = true
+
+module Rainbow
+  module Ext
+    module String
+      module InstanceMethods
+        def color(*code)
+          if code == :red
+            $check_failed = true
+          end
+          Rainbow(self).foreground(*code)
+        end
+      end
     end
-    orig_color(code)
   end
 end
 
@@ -46,7 +53,6 @@ namespace :gitlab do
       finished_checking "GitLab"
     end
 
-
     # Checks
     ########################
 
@@ -149,7 +155,7 @@ namespace :gitlab do
     def check_init_script_exists
       print "Init script exists? ... "
 
-      puts 'skipped (slapos version has no init script)'.magenta
+      puts 'skipped (slapos version has no init script)'.color(:magenta)
       return
 
       if omnibus_gitlab?
@@ -176,7 +182,7 @@ namespace :gitlab do
     def check_init_script_up_to_date
       print "Init script up-to-date? ... "
 
-      puts 'skipped (slapos version has no init script)'.magenta
+      puts 'skipped (slapos version has no init script)'.color(:magenta)
       return
 
       if omnibus_gitlab?
@@ -884,7 +890,7 @@ namespace :gitlab do
 
   def finished_checking(component)
     puts ""
-    puts "Checking #{component.color(:yellow)} ... #{$check_failed ? "Failed"color(:red) : "OK".color(:green)}"
+    puts "Checking #{component.color(:yellow)} ... #{$check_failed ? "Failed".color(:red) : "OK".color(:green)}"
     puts ""
     exit 1 if $check_failed
   end