Include full output from mocha/karma in CI (#7567)

Author: dconeybe

config/karma.base.js

@@ -87,11 +87,5 @@ const config = {
 config.mochaReporter = {
   showDiff: true
 };
-// Make it easy to spot failed tests in CI
-if (process.env.CI) {
-  config.mochaReporter = {
-    output: 'minimal'
-  };
-}
 
 module.exports = config;

config/mocharc.node.js

@@ -29,11 +29,6 @@ const config = {
   exit: true
 };
 
-// use min reporter in CI to make it easy to spot failed tests
-if (process.env.CI) {
-  config.reporter = 'min';
-}
-
 // Firestore uses babel to compile tests in Nodejs
 if (process.env.NO_TS_NODE) {
   delete config.require;