Apache Compliance required changes  (#3080)

* kie-issues#1165 Adding Apache headers to .gitignore files

* kie-issues#1165 Adding Apache headers to missing source code files

* kie-issues#1165 Adding Apache headers to adoc files

* kie-issues#1165 Adding Apache headers to .gitattributes file

* kie-issues#1165 Adding Apache headers to yaml files.

* kie-issues#1165 Adding Apache headers to drl and ftl template files.

* kie-issues#1165 Adding Apache headers to remaining files + additional NOTICE and DISCLAIMER files.

* kie-issues#1165 Adding Apache headers to .bat file.
189 files changed