Closes-Bug: #154962 - python-kafka-python package removed from repo

This means apt-get remove fails due to Error: Unable to find package
Using dpkg -P instead, to remove package as it only reports warning and moves on.

Change-Id: Iad798ed49c3d9012a6b0e20b38b2fcd225de89e6

Author: nitishkrishna

contrail/environment/modules/contrail/manifests/collector/install.pp

@@ -1,6 +1,6 @@
 class contrail::collector::install {
     exec { 'Temporarily delete contrail-analytics to upgrade python-kafka' :
-          command   => "apt-get -y --force-yes purge contrail-analytics python-kafka-python",
+          command   => "dpkg -P contrail-analytics python-kafka-python",
           provider  => shell,
           logoutput => $contrail_logoutput,
           before => Package['python-kafka'],
@@ -13,4 +13,4 @@
         ensure => latest,
         configfiles => "replace",
     }
-}
+}