NIFI-8528 Migrate NiFi Registry fully codebase into NiFi as a module. No changes except certain dependency scopes to preserve the NiFi Registry original by overriding the new parent (nifi).
- Version adjustments. Removed distinct checkstye rules form nifi-registry. (Using nifi's instead.)
- Made some tests Windows-compatible.
- Consolidated LICENSE, NOTICE and README.md.
- Fixed CryptoKeyLoaderGroovyTest.groovy.
- Disable frontend-maven-plugin on Windows.
- Skipping all goals of the frontend-maven-plugin on Windows.
- Registry integration tests not to run in github jobs (same as the original settings). Skip all registry tests (build and run) on Windows.
- Removed Husky from registry.