Allow custom object formatters to be added in beforeAll

Fixes #1876.

spec/core/integration/CustomObjectFormatterSpec.js

@@ -42,7 +42,7 @@ describe('Custom object formatters', function() {
     });
 
     env.describe('with custom pretty-printer', function() {
-      env.beforeEach(function() {
+      env.beforeAll(function() {
         env.addCustomObjectFormatter(function(obj) {
           return 'custom(' + obj + ')';
         });

src/core/Env.js

@@ -424,6 +424,9 @@ getJasmineRequireObj().Env = function(j$) {
         resources.customAsyncMatchers = j$.util.clone(
           runnableResources[parentRunnableId].customAsyncMatchers
         );
+        resources.customObjectFormatters = j$.util.clone(
+          runnableResources[parentRunnableId].customObjectFormatters
+        );
         resources.defaultStrategyFn =
           runnableResources[parentRunnableId].defaultStrategyFn;
       }