Don't let clojure.test/test-var be dynamically bound. Fixes #246.

Signed-off-by: Rich Hickey <richhickey@gmail.com>

src/clj/clojure/test.clj

@@ -633,7 +633,7 @@
 
 ;;; RUNNING TESTS: LOW-LEVEL FUNCTIONS
 
-(defn test-var
+(defn #^{:dynamic true} test-var
   "If v has a function in its :test metadata, calls that function,
   with *testing-vars* bound to (conj *testing-vars* v)."
   [v]