JavaVersion.isIBMJvm() incorrect or need isOpenJ9Jvm()

[andrew-m-leonard]

JdiTest suite assume if isIBMJvm() is true it can use jdwp trace=.. options, but they are not supported for OpenJ9:

ASI2 stderr ERROR: JDWP option syntax error: -agentlib:jdwp=transport=dt_socket,address=30001,server=y,timeout=300000,trace=PROG+CMD+PACK+DATA

Either IBMJvm() means IBMSDK only, or JdiTest needs a JavaVersion.isOpenJ9Jvm() method?

[lumpfish]

Some pertinent history: #7