[maven-release-plugin] copy for tag 1.21.0

Limits names lookback in Elasticsearch (openzipkin#1538)

This reuses `QUERY_LOOKBACK` to limit names queries (service and span
names) from searching all indexes. This is particularly important for
high-volume sites (ex 100% sampling or high traffic), and those who do
not use curator or otherwise to prune data.

Fixes openzipkin#1462 (at least helps a lot with no schema change)

[maven-release-plugin] copy for tag 1.20.1

Lets MergeById.apply accept an Iterable (openzipkin#1519)

Spark jobs result in iterables. This change allows MergeById to be more
conveniently reused.

[maven-release-plugin] copy for tag 1.20.0

Moves license plugin disabling to the release profile

It was being ignored during release:prepare for some reason

See openzipkin#1512

[maven-release-plugin] copy for tag 1.19.4

Set result size when fetching dependency links from ElasticSearch (op…

…enzipkin#1504)

Otherwise it only returns 10.

Fixes openzipkin#1503

[maven-release-plugin] copy for tag 1.19.3

Fixes inconsistent docker version