travis reruns ./test in case of error code 200, 10 times max

This is to combat what are apparently transient timeout faults
where the travis workers choke on running ./test and never
actually start the process... it seems not even to get to the
"running 140 tests" message when it ends with error code 200.

.travis.yml

@@ -9,7 +9,7 @@ script:
     - scons cxxtool=$CXX strict=True wesnoth wesnothd campaignd test
     - "export DISPLAY=:99.0"
     - "sh -e /etc/init.d/xvfb start"
-    - ./test
+    - ./test_wrapper.sh
     - ./run_wml_tests -u -t 15
 after_failure:
     - ./travis_after_failure.sh

test_wrapper.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+COUNTER=10
+./test
+ERRORCODE=$?
+while [ $COUNTER -gt 0 -a $ERRORCODE -eq 200 ]; do
+    echo "test apparently timed out with error code 200... trying again."
+    let COUNTER = COUNTER - 1
+    ./test
+    ERRORCODE=$?
+done
+exit $ERRORCODE