BaseEntity: remote property was not usable.

[fihuer]

Before, we could set a remote property (Boolean) but it was rewriten in BaseEntity's inherits_from with the result of a comparison of a Boolean and a NoneType. Thus, we could only set remote to True, because 'False or None' evaluates to None, which is the default value.

Now, we can set the remote property to False and use the functionality it unveils within ClusterShell.