Description of problem:
NPE in cli is thrown when using preserve, override without parameter

Version-Release number of selected component (if applicable):
EAP 6.2.0.CR2

Steps to Reproduce:
1. in jboss-cli run command patch apply <path_to_patch> --preserve or patch apply <path_to_patch> --override

Actual results:
java.lang.NullPointerException
        at org.jboss.as.patching.cli.PatchHandler.createPatchOperationBuilder(PatchHandler.java:353)
        at org.jboss.as.patching.cli.PatchHandler.doHandle(PatchHandler.java:246)
        at org.jboss.as.cli.handlers.CommandHandlerWithHelp.handle(CommandHandlerWithHelp.java:86)
        at org.jboss.as.cli.impl.CommandContextImpl.handle(CommandContextImpl.java:600)
        at org.jboss.as.cli.impl.CommandContextImpl.handleSafe(CommandContextImpl.java:616)
        at org.jboss.as.cli.impl.CommandContextImpl.interact(CommandContextImpl.java:1204)
        at org.jboss.as.cli.impl.CliLauncher.main(CliLauncher.java:263)
        at org.jboss.as.cli.CommandLineMain.main(CommandLineMain.java:34)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.jboss.modules.Module.run(Module.java:292)
        at org.jboss.modules.Main.main(Main.java:455)


Expected results:
Error message saying that preserve and override requires path as parameter