added more tests to hosts_controller_test

added test for list action in auth_sources_controller_test

added test for show action in audit_controller_test

removed the ldap connection test from auth_source_ldap_test

added report_observer test

finished tests for environment

added test for pupetclass

removed trailing spaces from hosts and users controller test

added the fact value test, seems to be a bug in the mem_average method from the model...

removed trailing spaces in models_controller_test