reuse protocol form definition

[pconesa]

it will reduce performance to 2/3 but needs to be tested properly.

The approach tested is:

at protocol.py:

1.- declare a dictionary to hold the form definition at class level (Static)

__FORM_DICT__ = {}

2.- Load the form definition is not in the dictionary:

Inside the init:

    self._definition = self.__FORM_DICT__.get(self.getClassName(), None)
    if self._definition is None:
        self._definition = Form(self)
        self._defineParams(self._definition)
        self.__FORM_DICT__[self.getClassName()] = self._definition

This works fine but there is a problem with Params that need to react to other params changes: e.g.: protocol_ctf_assign.py has a inputSetsParam that needs to change base on inputType