TT#56376 selenium: add error labels to crash detection

crash detection will now check for error labels and will print them out
if possible

Change-Id: Ib583608a2b1f27ea32d079b17676acdfc5940b7c

t/lib/Selenium/Collection/Common.pm

@@ -389,6 +389,16 @@ sub crash_handler {
         diag("Tab Title: $title");
         diag("nginx error: $crashvar");
         diag("Perl localtime(): $realtime");
+    } elsif(eval{$self->driver->find_element('//*[@id="content"]//div[@class="alert alert-error"]')}) {
+        my $label = "Label: could not get text";
+        eval {
+            $label = $self->driver->find_element('//*[@id="content"]//div[@class="alert alert-error"]')->get_text();
+        };
+        diag("Server: $ENV{CATALYST_SERVER}");
+        diag("Url: $url");
+        diag("Tab Title: $title");
+        diag("Error Label: $label");
+        diag("Perl localtime(): $realtime");
     } else {
         diag("Could not detect Server issues. Maybe script problems?");
         diag("If you still want to check server logs, here's some info");