projectile should run maven with "mvn -B"

[steinarb]

projectile should use the "-B" command line argument when using maven to compile the project.

This removes all of the text coloring escape characters of the output and results in a lot less clutter in the compile buffer.

I.e. you get

mvn -B clean install
[INFO] Scanning for projects...
[INFO] 
...

instead of

mvn clean install
[^[1;34mINFO^�[m] Scanning for projects...
[^[1;34mINFO^�[m] 
...

[bbatsov]

I'm fine with the suggestion. Haven't used maven in a while - last time I checked it didn't use ANSI colours. :-)

[steinarb]

Created a PR for this, but it wasn't shown here: #1652