NumberFormatException thrown by ErrorProne parser

[djh82]

Following error was thrown:

java.lang.NumberFormatException: For input string: "none -target 1.8 -source 1.8 -g"

It seems odd that the regex used by GoogleErrorProneParser doesn't enforce that capture group 5 is a number, since it immediately tries to call Integer.parseInt on it.

[tomasbjerre]

There are also other issues reported on errorprone. Best might be tonremove it.

Sadly they dont seem to understand the importance of google/error-prone#444

Also #95 may be an alternative to replace errorprone parser.

[djh82]

OK, we use error prone a lot. I'd implement the ability to output in a known format....if I knew they were going to accept it/at least engage.