Include slot parameter in valgrind testsuite driver

This fixes up !24 (merged) which added the slot parameter, but
missed the valgrind driver.

TN: T616-039

Author: Aleksandra Pasek

testsuite/drivers/valgrind.py

@@ -1,7 +1,7 @@
 from drivers import bin_check_call
 
 
-def check_call_valgrind(driver, cmd, test_name=None, result=None, **kwargs):
+def check_call_valgrind(driver, cmd, slot, test_name=None, result=None, **kwargs):
     """
     Wrapper for `e3.testsuite.process` that runs the process under Valgrind if
     this is a Valgrind-checked testsuite run. The process exit status will be
@@ -10,4 +10,4 @@ def check_call_valgrind(driver, cmd, test_name=None, result=None, **kwargs):
     if driver.env.valgrind:
         cmd = ['valgrind', '-q', '--error-exitcode=2',
                '--leak-check=full'] + cmd
-    return bin_check_call(driver, cmd, test_name, result, **kwargs)
+    return bin_check_call(driver, cmd, slot, test_name, result, **kwargs)