Give test models more descriptive names.

test/active_record_test.rb

test/calculations_test.rb

test/configuration_test.rb

test/custom_block_test.rb

test/geocoder_test.rb

test/lookup_test.rb

test/method_aliases_test.rb

test/mongoid_test.rb

test/mongoid_test_helper.rb

test/near_test.rb

test/test_helper.rb