Jersey memory leak

Project reproduces memory leak in jersey 2.12

Running

```
mvn install
export MAVEN_OPTS="-Xmx128m"
mvn jetty:run
```

Endpoint

```
curl http://localhost:8080/a/b/data/c
```

Memory Leak reported by Eclipse Memory Analyzer

```
55,674 instances of "org.jvnet.hk2.internal.SystemDescriptor", loaded by "org.eclipse.jetty.webapp.WebAppClassLoader @ 0x7b0f31e78" occupy 153,827,128 (79.07%) bytes. These instances are referenced from one instance of "org.jvnet.hk2.internal.ServiceLocatorImpl", loaded by "org.eclipse.jetty.webapp.WebAppClassLoader @ 0x7b0f31e78"

Keywords
org.jvnet.hk2.internal.SystemDescriptor
org.jvnet.hk2.internal.ServiceLocatorImpl
org.eclipse.jetty.webapp.WebAppClassLoader
```