Fix Puppet Labs Issue Tracker URL
Fix issue with aborted rake task when packaging gem.

When attempting to package the gem, the following error is thrown and the task is aborted.
This patch updates the Rakefile to use the correct task for packaging.

$ rake package:gem
rake aborted!
ERROR: 'rake/gempackagetask' is obsolete and no longer supported. Use 'rubygems/package_task' instead.
/home/acline/Development/puppetlabs_spec_helper/Rakefile:3:in `<top (required)>'
/home/acline/.rvm/gems/ruby-1.9.3-p194/bin/ruby_noexec_wrapper:14:in `eval'
/home/acline/.rvm/gems/ruby-1.9.3-p194/bin/ruby_noexec_wrapper:14:in `<main>'
(See full trace by running task with --trace)
(#21602) Updated rake_tasks.rb to include 'integration' folder when
running spec tests.
Merge pull request #33 from DavidS/patch-1

Fix Puppet Labs Issue Tracker URL
Merge pull request #34 from AlexCline/rake-task-fix

Fix issue with aborted rake task when packaging gem.
Merge pull request #35 from fatmcgav/ticket/master/21602

(#21602) Updated rake_tasks.rb to include 'integration' folder when running spec tests.
Do not lint fixtures directory.
Merge pull request #38 from nanliu/lint

Do not lint fixtures directory.
Add syntax checking task
Merge pull request #36 from dalen/syntax_check

Add syntax checking task