Add delay for checking text to try and fix behat.

tests/behat/report.feature

@@ -129,6 +129,7 @@ Feature: Visiting reports
             | id_sessiontype_1     | 1  |
             | id_groups            | Group1 |
          And I click on "id_submitbutton" "button"
+         And I wait until the page is ready
         Then I should see "3am - 4am"
          And "Group: Group1" "text" should exist in the "3am - 4am" "table_row"
 
@@ -167,6 +168,7 @@ Feature: Visiting reports
             | id_sestime_starthour | 03 |
             | id_sestime_endhour   | 04 |
          And I click on "id_submitbutton" "button"
+         And I wait until the page is ready
         Then I should see "3am - 4am"
 
         When I click on "Take attendance" "link" in the "3am - 4am" "table_row"
@@ -179,6 +181,7 @@ Feature: Visiting reports
             | id_sestime_starthour | 05 |
             | id_sestime_endhour   | 06 |
          And I click on "id_submitbutton" "button"
+        And I wait until the page is ready
         Then I should see "05:00 - 06:00"
 
         When I follow "Report"