Passing struct by value essentially gives you a copy, so when modified
within a function, the scope is then reduced to that function. Using
pointers solves that you mutate the struct as many times as you want from
anywhere.
As a result, the auto-detection of the Vault KV backend was not working
correctly.
Also, added a ton of unit tests for Vault.
Signed-off-by: Sébastien Han <seb@redhat.com>
Sébastien Han
d675969567