No colored output for maven build during build since 0.5.3

[jonbrohauge]

Please provide precise details of the issue you detected.

Test environment

• Jenkins Version: 2.142+
• AnsiColor Version: 0.6.2
• Hostsystem: linux

Expected behavior

During build there should be colored output

Actual behavior

During build there is no colored output

After the build has completed, and the console output is viewed, the output is colorized correctly.

Steps to reproduce the behavior

Bump Ansi Color Plugin from 0.5.3 to 0.6.2
The screen shots are taken from a maven build.

[jonbrohauge]

Basically the same issue as #136.