fix(vault): revert Vault JWT authentication not working

mentioned in commit a7b30cc7

mentioned in merge request to-be-continuous/samples/mkdocs-on-s3!10 (merged)

mentioned in merge request doc!15 (merged)

mentioned in merge request kicker!72 (merged)

mentioned in merge request to-be-continuous/samples/mkdocs-on-s3!13 (merged)

mentioned in merge request kicker!92 (merged)

mentioned in merge request doc!19 (merged)

mentioned in merge request to-be-continuous/samples/angular-on-s3!81 (merged)

mentioned in merge request cedric3.olivier/mkdocs-on-s3!2 (closed)