DRILL-6751: Upgrade Apache parent POM to version 21
- Update apache.pom file version to 21 (with updating some maven plugins versions)
- Include Drill's sources jars on assembly stage in <moduleSets> (not <dependencySets>)
for properincluding jars with last apache-21.pom
- Separate "distro-assembly" to the two execution stages to avoid:
[WARNING] Assembly file: <DRILL_HOME>/distribution/target/apache-drill-1.15.0-SNAPSHOT is not a regular
file (it may be a directory). It cannot be attached to the project build for installation or deployment.
- Remove unsused <include>/<exclude> in assebly descriptor to avoid:
[WARNING] The following patterns were never triggered in this artifact inclusion filter
- Update "maven-assembly-plugin" version
- Update "slf4j" version
- Update "mockito-core" version
- Update "bcpkix-jdk15on" (Bouncy Castle Cryptography APIs) version
close apache/drill#1561
