Indicating that exception is being explicitly ignored

As per feedback here
https://github.com/aodn/aodn-portal/commit/32c6dfcb35cdac63683b8f2cc754bd53302f167e#commitcomment-3355522
the comment has been moved to indicate that the exception is intentionally being ignored.
Merge pull request #201 from aodn/issue-175

Indicating that exception is being explicitly ignored