More sonarqube fixes.

5 jobs for ENCAPSULATE_STATISTICS_FIELDS in 1 minute and 19 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
passed #8156
jars-j8

00:00:35

failed #8155
java8

00:00:44

 
  Test
skipped #8158
allowed to fail
java10
skipped #8159
allowed to fail
java11
skipped #8157
java7
 
Name Stage Failure
failed
java8 Build
28148 [ERROR] 
28148 [ERROR] Re-run Maven using the -X switch to enable full debug logging.
28149 [ERROR]
28149 [ERROR] For more information about the errors and possible solutions, please read the following articles:
28149 [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
28149 [ERROR]
28149 [ERROR] After correcting the problems, you can resume the build with the command
28149 [ERROR] mvn <goals> -rf :org.ow2.sat4j.core
ERROR: Job failed: exit code 1