lobster-python: false positive on duplicate function definition

[jnow-87]

lobster-python reports a duplicated function definition for severity() in the following example:

import dataclasses

@dataclasses.dataclass
class Diagnostic: 
    _severity: int = dataclasses.field()

    @property
    def severity(self):
        return self._severity

    @severity.setter
    def severity(self, value: int):
        self._severity = value

These are clearly not duplicate functions but separate ones which can both be called on the same instance if Diagnostic. Hence, this case should be fixed within lobster.

The problem might originate from here

lobster/lobster/tools/python/python.py

Lines 197 to 198 in 6bb274e

	l_item = Implementation(tag = Tracing_Tag("python",
	self.fqn()),

since the function tag is built only using self.fqn(), which is probably the function name. A solution might be to consider the entire function signature as the tag.

[phiwuu]

Possible duplicate of #30