Enable basic infrastructure for PEL testing

What infrastructure support is enabled
     - Added keyword to run peltool command.
     - Added basic test case to create and verify PEL log.

Change-Id: I9e902adbeef317293571d77c72b01e19891b2336
Signed-off-by: Rahul Maheshwari <rahulmaheshwari@in.ibm.com>
diff --git a/lib/pel_utils.py b/lib/pel_utils.py
new file mode 100644
index 0000000..cf2eeab
--- /dev/null
+++ b/lib/pel_utils.py
@@ -0,0 +1,41 @@
+#!/usr/bin/env python
+
+r"""
+PEL functions.
+"""
+
+import func_args as fa
+import bmc_ssh_utils as bsu
+import json
+
+
+def peltool(option_string, **bsu_options):
+    r"""
+    Run peltool on the BMC with the caller's option string and return the result.
+
+    Example:
+
+    ${pel_results}=  Peltool  -l
+    Rprint Vars  pel_results
+
+    pel_results:
+      [0x50000031]:
+        [CompID]:                       0x1000
+        [PLID]:                         0x50000031
+        [Subsystem]:                    BMC Firmware
+        [Message]:                      An application had an internal failure
+        [SRC]:                          BD8D1002
+        [Commit Time]:                  02/25/2020  04:51:31
+        [Sev]:                          Unrecoverable Error
+        [CreatorID]:                    BMC
+
+    Description of argument(s):
+    option_string           A string of options which are to be processed by the peltool command.
+    bsu_options             Options to be passed directly to bmc_execute_command. See its prolog for
+                            details.
+    """
+
+    bsu_options = fa.args_to_objects(bsu_options)
+    out_buf, stderr, rc = bsu.bmc_execute_command('peltool ' + option_string, **bsu_options)
+    out_buf = json.loads(out_buf)
+    return out_buf