Ignore irrelevant header lines in checkstyle configuration
* Ignores the empty lines that may have trailing white-space in the
license header. This allows formatting of the license header either
with or without trailing white-space, which differs between different
versions of Eclipse (as well as between IDEs).
Change-Id: If97d2cfe169accd6d05e44521c9ca5265d715772
* Validates that all java files contains a license file and fails the build if a license is missing
* For now runs a lot of checks with a severity less than error to avoid failing the build
* Outputs test results to TeamCity for reporting
Change-Id: I24ca9cd0646a4bc530ef3a183eef1bc4addc555d