Fix 1.8.7 Issue

Prior to this commit out tests failed

~~~
/home/travis/.rvm/rubies/ruby-1.8.7-p374/bin/ruby -S rspec
spec/classes/config_spec.rb spec/classes/install/bundle_spec.rb
spec/classes/install/gem_spec.rb spec/classes/install/pe_gem_spec.rb
spec/classes/install_spec.rb
spec/classes/mcollective/application_spec.rb
spec/classes/mcollective_spec.rb spec/classes/params_spec.rb
spec/classes/prerun_command_spec.rb spec/classes/r10k_spec.rb --color
/home/travis/.rvm/gems/ruby-1.8.7-p374/gems/rspec-core-2.14.6/lib/rspec/core/configuration.rb:896:in
`load':
/home/travis/build/acidprime/r10k/spec/classes/config_spec.rb:60: syntax
error, unexpected ')' (SyntaxError)
/home/travis/build/acidprime/r10k/spec/classes/config_spec.rb:104:
syntax error, unexpected kEND, expecting '}'
    from
    /home/travis/.rvm/gems/ruby-1.8.7-p374/gems/rspec-core-2.14.6/lib/rspec/core/configuration.rb:896:in
    `load_spec_files'
        from
        /home/travis/.rvm/gems/ruby-1.8.7-p374/gems/rspec-core-2.14.6/lib/rspec/core/configuration.rb:896:in
        `each'
            from
            /home/travis/.rvm/gems/ruby-1.8.7-p374/gems/rspec-core-2.14.6/lib/rspec/core/configuration.rb:896:in
            `load_spec_files'
                from
                /home/travis/.rvm/gems/ruby-1.8.7-p374/gems/rspec-core-2.14.6/lib/rspec/core/command_line.rb:22:in
                `run'
                    from
                    /home/travis/.rvm/gems/ruby-1.8.7-p374/gems/rspec-core-2.14.6/lib/rspec/core/runner.rb:80:in
                    `run'
                        from
                        /home/travis/.rvm/gems/ruby-1.8.7-p374/gems/rspec-core-2.14.6/lib/rspec/core/runner.rb:17:in
                        `autorun'
                            from
                            /home/travis/.rvm/gems/ruby-1.8.7-p374/bin/rspec:23
                            /home/travis/.rvm/rubies/ruby-1.8.7-p374/bin/ruby
                            -S rspec spec/classes/config_spec.rb
                            spec/classes/install/bundle_spec.rb
                            spec/classes/install/gem_spec.rb
                            spec/classes/install/pe_gem_spec.rb
                            spec/classes/install_spec.rb
                            spec/classes/mcollective/application_spec.rb
                            spec/classes/mcollective_spec.rb
                            spec/classes/params_spec.rb
                            spec/classes/prerun_command_spec.rb
                            spec/classes/r10k_spec.rb --color failed
~~~
Add 1.8.7 back to ci

Prior to this commit I had disabled due to an issue with the spec tests