Update netscaler_feature_spec.rb
Update netscaler_feature_spec.rb

Added 2 Features that have had issues in the past (FM-2596)
cyrus-mc/puppetlabs-netscaler,puppetlabs/puppetlabs-netscaler,davemcdonnell/puppetlabs-netscaler,jbondpdx/puppetlabs-netscaler,tphoney/puppetlabs-netscaler,underscorgan/puppetlabs-netscaler,mhaskel/puppetlabs-netscaler