Clean up orphan DNS records

[cho00013]

There are handful of A, PTR, and TXT records that exist in the Route 53 zone that do not have corresponding EC2 instances.
Also, I did few spot check and noticed several A/PTR records that are orphaned (meaning, there's no EC2 instance associated). Again, I assume that these were due to the code's inability to delete the record for whatever reason. I don't have a good feel as to why that's the case.

ite.das.rm.census.gov. Zone

• ip-10-191-29-64.ite.das.rm.census.gov TXT
• ip-10-191-29-172.ite.das.rm.census.gov A
• ip-10-191-28-97.ite.das.rm.census.gov TXT
• ip-10-191-28-27.ite.das.rm.census.gov A
• ip-10-191-18-62.ite.das.rm.census.gov A
• ip-10-191-18-33.ite.das.rm.census.gov TXT
• ip-10-191-18-112.ite.das.rm.census.gov A

Few PTR zones that I checked by hand but not comprehensive.

[cho00013]

From @badra001

I did some cleanup already, but yeah, we need a script to handle it. I pulled DDB entries and extracted stuff with JQ, but it may be easier to build some python for that.

[cho00013]

Possible orphan records
ip-10-191-18-112.ite.das.rm.census.gov A Simple - 10.191.18.112
ip-10-191-18-62.ite.das.rm.census.gov A Simple - 10.191.18.62
ip-10-191-28-27.ite.das.rm.census.gov A Simple - 10.191.28.27
ip-10-191-29-79.ite.das.rm.census.gov A Simple - 10.191.29.79