Refactor to pass errors to watch through config YAML

Add errors to watch for through error YAML file
Add support for checkstop error type

Tested:
Generating dumps for elog, core, checkstop type errors.

Change-Id: Idd00ace2e3d0c472a74ec142e6d150e55e843a6f
Signed-off-by: Marri Devender Rao <devenrao@in.ibm.com>
diff --git a/example_errors_watch.yaml b/example_errors_watch.yaml
new file mode 100644
index 0000000..eb47ec6
--- /dev/null
+++ b/example_errors_watch.yaml
@@ -0,0 +1,2 @@
+elog:

+    - xyz.openbmc_project.Common.Error.InternalFailure