remove zf2_path env and update exception wording
remove zf2_path env and update exception wording

samsonasik/LearnZF2,Stanimirdim92/LearnZF2,sitrunlab/LearnZF2,Stanimirdim92/LearnZF2,Stanimirdim92/LearnZF2,sitrunlab/LearnZF2,samsonasik/LearnZF2,sitrunlab/LearnZF2,samsonasik/LearnZF2