Add ASF license header in non-java files

According to the a ASF policy all source files should contain an ASF header. Currently there are a lot of source files that do not contain the ASF header. The files can be broken into the following categories:

Must have:

• Python files (.py)
• Bash/Shell script files (.sh)
• Javascript files (.js)

Should have:

• Maven files (pom.xml)
• GitHub workflows and Docker files (.yml)

Good to have:

• Hive/Tez/Yarn and other configuration files (.xml)
• Log4J property files (.properties)
• Markdown files (.md)

Could have but OK if they don't:

• Data files for tests (data/files/**)
• Generated code files (src/gen)
• QTest input/output files (.q, .q.out)
• IntelliJ files (.idea)
• Other txt and data files

The changes here aim to address the first three categories (must, should, good) and add the missing header when possible.