Fixing slack import. (#2819)

webapp/components/team_import_tab.jsx

@@ -33,8 +33,8 @@ class TeamImportTab extends React.Component {
         this.setState({status: 'fail', link: ''});
     }
 
-    onImportSuccess(data) {
-        this.setState({status: 'done', link: 'data:application/octet-stream;charset=utf-8,' + encodeURIComponent(data)});
+    onImportSuccess(data, res) {
+        this.setState({status: 'done', link: 'data:application/octet-stream;charset=utf-8,' + encodeURIComponent(res.text)});
     }
 
     doImportSlack(file) {
@@ -167,4 +167,4 @@ TeamImportTab.propTypes = {
     intl: intlShape.isRequired
 };
 
-export default injectIntl(TeamImportTab);
+export default injectIntl(TeamImportTab);