Added access check + Druid in endpoint (#1224)

* Explore control panel - Chart control, TimeFilter, GroupBy, Filters (#1205)

* create structure for new forked explore view (#1099)

* create structure for new forked explore view

* update component name

* add bootstrap data pattern

* remove console.log

* Associate version to entry files (#1060)

* Associate version to entry files

* Modified path joins for configs

* Made changes based on comments

* Created store and reducers (#1108)

* Created store and reducers

* Added spec

* Modifications based on comments

* Explore control panel components: Chart control, Time filter, SQL,
GroupBy and Filters

* Modifications based on comments

* Added access check + Druid in endpoint

* pull grains to constants

* Switch explore.html to old version

caravel/assets/javascripts/explorev2/reducers/exploreReducer.js

@@ -103,6 +103,9 @@ export const exploreReducer = function (state, action) {
     [actions.CLEAR_ALL_OPTS]() {
       return Object.assign({}, state, defaultOpts);
     },
+    [actions.SET_DATASOURCE_CLASS]() {
+      return Object.assign({}, state, { datasourceClass: action.datasourceClass });
+    },
   };
   if (action.type in actionHandlers) {
     return actionHandlers[action.type]();