Added role to host global vars to all other roles. Updated tasks tittles to solve issue707. #1931

Job	Run time
pre-commit_and_sanity / markdown-link-check	1m 8s
pre-commit_and_sanity / pre-commit / pre-commit	2m 1s
pre-commit_and_sanity / sanity / ansible stable-2.13 sanity	1m 20s
pre-commit_and_sanity / sanity / ansible stable-2.14 sanity	1m 22s
pre-commit_and_sanity / sanity / ansible stable-2.15 sanity	1m 7s
pre-commit_and_sanity / sanity / ansible milestone sanity	1m 35s
pre-commit_and_sanity / sanity / ansible devel sanity	1m 16s
pre-commit_and_sanity / all_green	1s
	9m 50s

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