patman: Convert camel case in test_util.py

Convert this file to snake case and update all files which use it.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/patman/main.py b/tools/patman/main.py
index 8507321..7a6e910 100755
--- a/tools/patman/main.py
+++ b/tools/patman/main.py
@@ -135,12 +135,12 @@
     from patman import func_test
 
     result = unittest.TestResult()
-    test_util.RunTestSuites(
+    test_util.run_test_suites(
         result, False, False, False, None, None, None,
         [test_checkpatch.TestPatch, func_test.TestFunctional,
          'gitutil', 'settings', 'terminal'])
 
-    sys.exit(test_util.ReportResult('patman', args.testname, result))
+    sys.exit(test_util.report_result('patman', args.testname, result))
 
 # Process commits, produce patches files, check them, email them
 elif args.cmd == 'send':
diff --git a/tools/patman/test_util.py b/tools/patman/test_util.py
index c3f15f8..c60eb36 100644
--- a/tools/patman/test_util.py
+++ b/tools/patman/test_util.py
@@ -23,7 +23,7 @@
     use_concurrent = False
 
 
-def RunTestCoverage(prog, filter_fname, exclude_list, build_dir, required=None,
+def run_test_coverage(prog, filter_fname, exclude_list, build_dir, required=None,
                     extra_args=None):
     """Run tests and check that we get 100% coverage
 
@@ -102,7 +102,7 @@
         sys.stdout, sys.stderr = old_out, old_err
 
 
-def ReportResult(toolname:str, test_name: str, result: unittest.TestResult):
+def report_result(toolname:str, test_name: str, result: unittest.TestResult):
     """Report the results from a suite of tests
 
     Args:
@@ -139,8 +139,8 @@
     return 0
 
 
-def RunTestSuites(result, debug, verbosity, test_preserve_dirs, processes,
-                  test_name, toolpath, class_and_module_list):
+def run_test_suites(result, debug, verbosity, test_preserve_dirs, processes,
+                    test_name, toolpath, class_and_module_list):
     """Run a series of test suites and collect the results
 
     Args: