Reduce the default test threads from 4->1, and increase test time limit

Makefile

@@ -26,7 +26,7 @@ PYTHON_MICRO_VERSION := 3
 MAX_MEM_KB := 500000
 MAX_DBG_MEM_KB := 500000
 
-TEST_THREADS := 4
+TEST_THREADS := 1
 
 ERROR_LIMIT := 10
 COLOR := 1

tools/tester.py

@@ -35,7 +35,7 @@ IMAGE = "pyston_dbg"
 KEEP_GOING = False
 FN_JUST_SIZE = 20
 EXTRA_JIT_ARGS = []
-TIME_LIMIT = 6
+TIME_LIMIT = 10
 
 # For fun, can test pypy.
 # Tough because the tester will check to see if the error messages are exactly the