Small fixes: timestamp format, keypair naming

Related-PROD: PROD-36943
Change-Id: I0a85585c11aee7475dbcfb59c57fd424c6dafeb9
diff --git a/utils/helpers.py b/utils/helpers.py
index 92ab0c0..52db4dc 100644
--- a/utils/helpers.py
+++ b/utils/helpers.py
@@ -89,8 +89,8 @@
                        "{} folder.".format(dir_path))
         return
     datetime_now = datetime.datetime.now()
-    timestamp = datetime_now.strftime("%d%m%Y_%H%M%S")
-    report_file = "spt_report_{}.html".format(timestamp)
+    timestamp = datetime_now.strftime("%Y-%m-%dT%H-%M")
+    report_file = "spt-report-{}.html".format(timestamp)
     csv_files = ["{}{}".format(dir_path, f)
                  for f in sorted(os.listdir(path=dir_path))
                  if f.endswith('.csv')]