CLI, some completion issues

4 issues with command arguments completion:
1) " " and "=false" shouldn't be proposed for argument without values (that is a regression introduced by the support of implicit true value).
2) arguments without values used to stop completion to operate. For example ls --resolve-expressions should complete to the argument separator " " if no more arguments can be added.
3) "=" character is not appended to argument that has a value (that is a regression introduced by the support of implicit true value).
4) Exception in read-attribute completing the node
read-attribute --node
org.jboss.as.cli.CommandFormatException: Couldn't locate ' --node=' in the line: 'read-attribute --node'
at org.jboss.as.cli.handlers.ReadAttributeHandler.getAddress(ReadAttributeHandler.java:325)
at org.jboss.as.cli.handlers.ReadAttributeHandler$2.canAppearNext(ReadAttributeHandler.java:114)
at org.jboss.as.cli.operation.OperationRequestCompleter.complete(OperationRequestCompleter.java:257)
at org.jboss.as.cli.operation.OperationRequestCompleter.complete(OperationRequestCompleter.java:73)
at org.jboss.as.cli.CommandCompleter.doComplete(CommandCompleter.java:126)
at org.jboss.as.cli.CommandCompleter.complete(CommandCompleter.java:63)
at org.jboss.as.cli.impl.Console$Factory$1$1.complete(Console.java:141)
at org.jboss.aesh.console.AeshCompletionHandler.complete(AeshCompletionHandler.java:150)
at org.jboss.aesh.console.AeshInputProcessor.complete(AeshInputProcessor.java:420)
at org.jboss.aesh.console.AeshInputProcessor.parseOperation(AeshInputProcessor.java:165)
at org.jboss.aesh.console.Console.processInternalOperation(Console.java:735)
at org.jboss.aesh.console.Console.execute(Console.java:718)
at org.jboss.aesh.console.Console.access$900(Console.java:73)
at org.jboss.aesh.console.Console$6.run(Console.java:627)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)