fix gsub pattern for mongo_output
fix gsub pattern for mongo_output

Replace in json mongo_output all values like "function('something')" with string "foo", because I'm looking for 'ismaster' value only.
discovery-digital/puppetlabs-mongodb,discovery-digital/puppetlabs-mongodb,discovery-digital/puppetlabs-mongodb,discovery-digital/puppetlabs-mongodb,noris-network/puppetlabs-mongodb,noris-network/puppetlabs-mongodb,noris-network/puppetlabs-mongodb