Instance create fails due to invalid DNS record name

[Steve Leon]

DNS records are obtained from a decoded hash of the instance names. SInce we use base64 encoding, sometimes the record name that we get starts with a hyphen '-'. This is illegal for hostname. Also base64 encoding gives you upper and lower case letters. Hostnames are case insensitive.

The fix would be to use base32 encoding which gives you upper case letters and numbers which are legal for hostnames.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/63186

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/63186
Committed: https://git.openstack.org/cgit/openstack/trove/commit/?id=56dda9825beaf9580ca6099c76e2c0d6037db9eb
Submitter: Jenkins
Branch: master

commit 56dda9825beaf9580ca6099c76e2c0d6037db9eb
Author: Steve Leon <email address hidden>
Date: Thu Dec 19 10:20:35 2013 -0800

    Using base32 encoding to generate DNS records

    The Designate driver generate record names by
    hashing and 64-base encoding the instance ID.
    The problem is that 64-base encoding can generate
    hyphens and upper/lower case letters. Hyphens are
    illegal when it is at the beginning of the name.
    Name is also case insensitive. So the best solution
    is to use BASE-32 encoding.

    Change-Id: Ie98a0a50a609207df041c5f0bc2f622701ee9848
    Closes-Bug: #1262789