Added role to host global vars to all other roles. Updated tasks tittles to solve issue707. #1950

Job	Run time
pre-commit_and_sanity / markdown-link-check	1m 5s
pre-commit_and_sanity / pre-commit / pre-commit	1m 30s
pre-commit_and_sanity / sanity / ansible stable-2.13 sanity	1m 27s
pre-commit_and_sanity / sanity / ansible stable-2.14 sanity	1m 11s
pre-commit_and_sanity / sanity / ansible stable-2.15 sanity	1m 20s
pre-commit_and_sanity / sanity / ansible milestone sanity	1m 33s
pre-commit_and_sanity / sanity / ansible devel sanity	1m 32s
pre-commit_and_sanity / all_green	1s
	9m 39s

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