Make Infinispan to compile with IBM JDK 1.6

Richard would be happy to have this fixed:
https://bugzilla.redhat.com/show_bug.cgi?id=908338

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.0:compile (default-compile) on project infinispan-core: Compilation failure: Compilation failure:
[ERROR] /qa/hudson_ws/workspace/eap-6x-infinispan-rhel-ibm16-matrix/jdk/ibm16/label/RHEL5_x86_64/Infinispan/core/src/main/java/org/infinispan/jmx/annotations/ManagedAttribute.java:[48,40] incompatible types
[ERROR] found : org.infinispan.jmx.annotations.DataType
[ERROR] required: org.infinispan.jmx.annotations.DataType
[ERROR] /qa/hudson_ws/workspace/eap-6x-infinispan-rhel-ibm16-matrix/jdk/ibm16/label/RHEL5_x86_64/Infinispan/core/src/main/java/org/infinispan/jmx/annotations/ManagedAttribute.java:[50,49] incompatible types
[ERROR] found : org.infinispan.jmx.annotations.DisplayType
[ERROR] required: org.infinispan.jmx.annotations.DisplayType
[ERROR] /qa/hudson_ws/workspace/eap-6x-infinispan-rhel-ibm16-matrix/jdk/ibm16/label/RHEL5_x86_64/Infinispan/core/src/main/java/org/infinispan/jmx/annotations/ManagedAttribute.java:[52,61] incompatible types
[ERROR] found : org.infinispan.jmx.annotations.MeasurementType
[ERROR] required: org.infinispan.jmx.annotations.MeasurementType
[ERROR] /qa/hudson_ws/workspace/eap-6x-infinispan-rhel-ibm16-matrix/jdk/ibm16/label/RHEL5_x86_64/Infinispan/core/src/main/java/org/infinispan/jmx/annotations/ManagedAttribute.java:[54,31] incompatible types
[ERROR] found : org.infinispan.jmx.annotations.Units
[ERROR] required: org.infinispan.jmx.annotations.Units
[ERROR] /qa/hudson_ws/workspace/eap-6x-infinispan-rhel-ibm16-matrix/jdk/ibm16/label/RHEL5_x86_64/Infinispan/core/src/main/java/org/infinispan/jmx/annotations/ManagedAttribute.java:[48,40] incompatible types
[ERROR] found : org.infinispan.jmx.annotations.DataType
[ERROR] required: org.infinispan.jmx.annotations.DataType
[ERROR] /qa/hudson_ws/workspace/eap-6x-infinispan-rhel-ibm16-matrix/jdk/ibm16/label/RHEL5_x86_64/Infinispan/core/src/main/java/org/infinispan/jmx/annotations/ManagedAttribute.java:[50,49] incompatible types
[ERROR] found : org.infinispan.jmx.annotations.DisplayType
[ERROR] required: org.infinispan.jmx.annotations.DisplayType
[ERROR] /qa/hudson_ws/workspace/eap-6x-infinispan-rhel-ibm16-matrix/jdk/ibm16/label/RHEL5_x86_64/Infinispan/core/src/main/java/org/infinispan/jmx/annotations/ManagedAttribute.java:[52,61] incompatible types
[ERROR] found : org.infinispan.jmx.annotations.MeasurementType
[ERROR] required: org.infinispan.jmx.annotations.MeasurementType
[ERROR] /qa/hudson_ws/workspace/eap-6x-infinispan-rhel-ibm16-matrix/jdk/ibm16/label/RHEL5_x86_64/Infinispan/core/src/main/java/org/infinispan/jmx/annotations/ManagedAttribute.java:[54,31] incompatible types
[ERROR] found : org.infinispan.jmx.annotations.Units
[ERROR] required: org.infinispan.jmx.annotations.Units
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn <goals> -rf :infinispan-core