uitest: kill the LibreOffice instance if it ignores terminate request

Change-Id: I47c69878ebaa834eb75208ce8e5c26544e3e62bd

uitest/libreoffice/connection.py

@@ -93,7 +93,22 @@ class OfficeConnection:
                     pass # ignore
             else:
                 self.soffice.terminate()
-            ret = self.soffice.wait()
+
+            DEFAULT_SLEEP = 0.1
+            time_ = 0
+            while time_ < 5:
+                time_ += DEFAULT_SLEEP
+                ret_attr = self.soffice.poll()
+                if ret_attr is not None:
+                    break
+                time.sleep(DEFAULT_SLEEP)
+
+            ret = 0
+            if ret_attr is None:
+                ret = 1
+                self.soffice.terminate()
+
+            # ret = self.soffice.wait()
             self.xContext = None
             self.socket = None
             self.soffice = None