[CANCELED][VOTE] Release Apache Daffodil (incubating) 2.7.0-rc1

[Mike Beckerle]

Officially canceling the VOTE for 2.7.0-rc1. I'll create an rc2 and start a
new VOTE.

VOTE thread:
https://lists.apache.org/thread.html/rc56e1011317f44fd344a831213ff953d3feb4642fc20ec34ae29338a%40%3Cdev.daffodil.apache.org%3E


Thanks,
- Mike