Print parse error details for java files

[evoToBetter]

Is your feature request related to a problem? Please describe.
When there are errors in parseResult and parseResult.getResult() is null, impsort doesn't provide detials in log.
For example,
when there is this line in java file

String a="aa\sbb";

The plugin only provide log:

net.revelc.code.impsort.ex.ImpSortException: file: TestException1.java; reason: unable to successfully parse the Java file

Describe the solution you'd like
Add log print for parseResult.getProblems() when parseResult.getResult() is null

Describe alternatives you've considered
Add parseResult.getProblems() into message of ImpSortException.