Fix: Run with reporting disabled (elastic#25829)

* fix: relative link instead of static

* fix: handle missing reporting config value

* chore: refactor reportingBrowserType check

* fix: core interpreter reportingBrowserType

the code was duplicated from canvas, so it's equally as broken, this duplicates the fix

src/core_plugins/interpreter/init.js

@@ -25,7 +25,11 @@ export default async function (server /*options*/) {
   server.injectUiAppVars('canvas', () => {
     const config = server.config();
     const basePath = config.get('server.basePath');
-    const reportingBrowserType = config.get('xpack.reporting.capture.browser.type');
+    const reportingBrowserType = (() => {
+      const configKey = 'xpack.reporting.capture.browser.type';
+      if (!config.has(configKey)) return null;
+      return config.get(configKey);
+    })();
 
     return {
       kbnIndex: config.get('kibana.index'),

x-pack/plugins/canvas/init.js

@@ -15,7 +15,11 @@ export default async function(server /*options*/) {
   server.injectUiAppVars('canvas', () => {
     const config = server.config();
     const basePath = config.get('server.basePath');
-    const reportingBrowserType = config.get('xpack.reporting.capture.browser.type');
+    const reportingBrowserType = (() => {
+      const configKey = 'xpack.reporting.capture.browser.type';
+      if (!config.has(configKey)) return null;
+      return config.get(configKey);
+    })();
 
     return {
       kbnIndex: config.get('kibana.index'),

x-pack/plugins/canvas/public/components/workpad_export/index.js

@@ -6,9 +6,9 @@
 
 /* eslint import/no-unresolved: 1 */
 // TODO: remove eslint rule when updating to use the linked kibana resolve package
-import { jobCompletionNotifications } from 'plugins/reporting/lib/job_completion_notifications';
 import { connect } from 'react-redux';
 import { compose, withProps } from 'recompose';
+import { jobCompletionNotifications } from '../../../../reporting/public/lib/job_completion_notifications';
 import { getWorkpad, getPages } from '../../state/selectors/workpad';
 import { getReportingBrowserType } from '../../state/selectors/app';
 import { notify } from '../../lib/notify';