jrobotremoteserver should consider argument as kwarg when only a single map is passed to keyword instead of considering it as normal arg

[shan-96]

Coming from robotframework/JavalibCore#19 and robotframework documentation as java has no support for explicit kwarg variable, a single map passed on to robot keyword without ** must also be considered as kwarg.

In KeywordOverload.java while collecting arguments args is not null with one non empty map but kwargs are null. However the case should be exactly opposite

[Hi-Fi]

Hmmm... I would say no according linked documentation:

If a Java keyword accepts kwargs, Robot Framework will automatically pack all arguments in name=value syntax at the end of the keyword call into a Map and pass it to the keyword

[shan-96]

Linked to robotframework/JavalibCore#33