TagFix_Tree_Lang_fr: fix suggestion with | and voir aussi-list included

[Famlam]

https://osmose.openstreetmap.fr/nl/issue/0aa40099-8f6d-51eb-1269-4e5f754f2961

osmose-backend/plugins/TagFix_Tree_Lang_fr.py

Lines 39 to 47 in 1163c2a

	def liste_des_arbres_fruitiers(self):
	reline = re.compile(r"\[\[([^:]*)$")
	data = urlread(u"https://fr.wikipedia.org/wiki/Liste_des_arbres_fruitiers?action=raw", 1)
	#data = open(u"Liste_des_arbres_fruitiers?action=raw").read()
	data = data.split("]]")
	for line in data:
	for res in reline.findall(line):
	for n in res.split('|'):
	self.Tree[self.normalize(n)] = {'species:fr':res}

I spotted this while working on #2358

1. A tree with name = Grenadier in French-speaking countries triggers item=class=3120
   The proposed fix is species:fr = Grenadier commun|Grenadier
   Probably it should be either species:fr = Grenadier commun or species:fr = Grenadier, rather than a fix with a |

2. In addition I think this plugin incorrectly uses the Voir aussi-list as well to make fixes

[Famlam]

Regarding the first point:
Similar things as Grenadier commun|Grenadier will probably happen with:

• Prunus avium|Merisier
• Olivier (arbre)|Olivier
• Noix du Brésil|Noyer du Brésil

Fixing it (assuming it's truely an error) likely isn't too difficult, but I'll need someone who speaks French to tell me whether species:fr should be the thing before or after the | :)
Or maybe it can be either, or varies, but in that case we should probably modify the autofix suggestion.