Merge pull request #8 from felipe1982/patch-1

ensure => absent should require "install-pip"

Author: seocam

manifests/install.pp

@@ -42,6 +42,7 @@
       exec { "uninstall-${package}":
         command => "pip${python_version} uninstall ${package} -y",
         onlyif  => "pip${python_version} freeze | cut -d= -f1 | egrep '^${package}$'",
+        require => Exec["install-pip${python_version}"],
       }
     }
   }