#63 clear openssl error stack as this causes to close database connection

[arunahk]

I'm re opening this again. I signed the CLA.

[googlebot]

We found a Contributor License Agreement for you (the sender of this pull request), but were unable to find agreements for the commit author(s). If you authored these, maybe you used a different email address in the git commits than was used to sign the CLA (login here to double check)? If these were authored by someone else, then they will need to sign a CLA as well, and confirm that they're okay with these being contributed to Google.

[googlebot]

We found a Contributor License Agreement for you (the sender of this pull request), but were unable to find agreements for the commit author(s). If you authored these, maybe you used a different email address in the git commits than was used to sign the CLA (login here to double check)? If these were authored by someone else, then they will need to sign a CLA as well, and confirm that they're okay with these being contributed to Google.

[arunahk]

When I do the pull request, my email address was different. I added my email address to github which I used to sign CLA.

[bshaffer]

As this function returns the most recent error, we're ok with just throwing that as the exception.