Test documentation typo fixes using codespell tool

Changes:
      - Fix typo in code documentation and test name

Tested: - Using codespell tool.

Change-Id: Ia1b65bddc01a4b1c103af9f2094d87da11c88953
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/lib/pel_utils.py b/lib/pel_utils.py
index a0c52be..9899478 100644
--- a/lib/pel_utils.py
+++ b/lib/pel_utils.py
@@ -180,7 +180,7 @@
             )
     except Exception as e:
         raise peltool_exception(
-            "Exception occured during PEL and Event log "
+            "Exception occurred during PEL and Event log "
             "comparison for SRC or event ID and created "
             "time : "
             + str(e)