call sys.exit() with doctest failure results

terminatorlib/borg.py

@@ -100,7 +100,8 @@ if __name__ == '__main__':
             if not self.attribute:
                 self.attribute = 1
 
+    import sys
     import doctest
     (failed, attempted) = doctest.testmod()
     print "%d/%d tests failed" % (failed, attempted)
-
+    sys.exit(failed)

terminatorlib/config.py

@@ -427,6 +427,8 @@ class ConfigBase(Borg):
         return(True)
 
 if __name__ == '__main__':
+    import sys
     import doctest
     (failed, attempted) = doctest.testmod()
     print "%d/%d tests failed" % (failed, attempted)
+    sys.exit(failed)

terminatorlib/plugin.py

@@ -106,8 +106,9 @@ for %s' % (len(self.instances), capability))
         return(self.instances)
 
 if __name__ == '__main__':
+    import sys
     import doctest
     sys.path.insert(0, 'plugins')
     (failed, attempted) = doctest.testmod()
     print "%d/%d tests failed" % (failed, attempted)
-
+    sys.exit(failed)