[Bugfix] related to test case isolation (#18)

* fix example 10

* small edits

Author: bmcutler

examples/01_simple_python/submissions/buggy2.py

@@ -0,0 +1,3 @@
+# This file contains a math mistake, and will therefore be graded correct.
+
+print(64 * 9. / (5 + 32) )

examples/02_simple_cpp/submissions/compilation_warning.cpp

@@ -0,0 +1,7 @@
+#include <iostream>
+
+int main()
+{
+        int i;
+	std::cout << "Hello, world!" << std::endl;
+}

examples/10_java_coverage/config/config.json

@@ -1,6 +1,6 @@
 {
   "autograding" : {
-    "work_to_details": [ "*.csv" ]
+    "work_to_details": [ "**/*.csv" ]
   },
   "resource_limits" : {
     "RLIMIT_CPU" : 60,

examples/11_resources/config/config.json

@@ -1,6 +1,8 @@
 {
   "resource_limits" : {
-      // Allow the submission to run for 100 seconds.
+      // Allow the submission to run for 30 seconds.
+      // NOTE: there is an additional system buffer of 10
+      // seconds before the job is actually terminated.
       "RLIMIT_CPU" : 30
   },