refactor(SHS-5904): Use service instead of FileStorage, does not work… #1204

Job	Run time
test_phpunit	1m 26s
lint_theme	41s
set_sites	51s
test_new_site	12m 47s
test_existing_site (aaas)	4m 54s
test_existing_site (cmbprogram)	4m 15s
test_existing_site (cmems)	4m 2s
test_existing_site (gavin_wright__humsci)	2m 59s
test_existing_site (hs_design)	3m 23s
test_existing_site (iriss)	4m 10s
test_existing_site (middleeast)	3m 38s
test_existing_site (politicalscience)	4m 45s
test_existing_site (southasia)	4m 29s
test_existing_site (stanfordsciencefellows)	3m 28s
deploy_branch	0s
	55m 48s

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