Maven build gets stuck

[sbernard31]

On master build (mvn clean install) sometime the build get stucked on tests :

[INFO] ------------------------------------------------------------------------
[INFO] Building leshan - core 1.0.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-clean-plugin:2.4.1:clean (default-clean) @ leshan-core ---
[INFO] Deleting /jobs/genie.leshan/leshan/workspace/leshan-core/target
[INFO] 
[INFO] --- maven-resources-plugin:3.0.1:resources (default-resources) @ leshan-core ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 8 resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.3:compile (default-compile) @ leshan-core ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 109 source files to /jobs/genie.leshan/leshan/workspace/leshan-core/target/classes
[INFO] 
[INFO] --- maven-resources-plugin:3.0.1:testResources (default-testResources) @ leshan-core ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO] 
[INFO] --- maven-compiler-plugin:3.3:testCompile (default-testCompile) @ leshan-core ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 11 source files to /jobs/genie.leshan/leshan/workspace/leshan-core/target/test-classes
[INFO] 
[INFO] --- maven-surefire-plugin:2.19:test (default-test) @ leshan-core ---

-------------------------------------------------------
 T E S T S
-------------------------------------------------------
SLF4J: The following set of substitute loggers may have been accessed
SLF4J: during the initialization phase. Logging calls during this
SLF4J: phase were not honored. However, subsequent logging calls to these
SLF4J: loggers will work as normally expected.
SLF4J: See also http://www.slf4j.org/codes.html#substituteLogger
ERROR StatusLogger No log4j2 configuration file found. Using default configuration: logging only errors to the console.
SLF4J: org.eclipse.leshan.core.node.codec.DefaultLwM2mValueConverter
SLF4J: org.eclipse.leshan.json.JsonSerializerTest
SLF4J: org.eclipse.leshan.json.JsonDeserializerTest
SLF4J: org.eclipse.leshan.tlv.TlvEncoder
SLF4J: org.eclipse.leshan.tlv.TlvDecoder
SLF4J: org.eclipse.leshan.core.model.DDFFileParser
SLF4J: org.eclipse.leshan.core.model.ObjectLoader
SLF4J: org.eclipse.leshan.core.model.LwM2mModel

This seems to be a minimal-json issue : ralfstx/minimal-json#77
A fixed version should be available soon.

Waiting I will remove parallel test on master.