Add mTLS settings to ApiClient #1513

Job	Run time
Build Reaper	5m 11s
Build Reaper	5m 23s
Memory backends	0s
Cassandra backend	0s
HTTP Management	0s
Docker Image Tests	0s
Each DC Availability	0s
Each DC Availability	0s
Distributed tests	0s
Distributed tests	0s
Flapping reapers	0s
Flapping reapers	0s
Sidecar	0s
Sidecar	0s
Release Reaper	0s
Release Reaper	0s
Docker Image Tests (cassandra, docker)	37m 9s
Cassandra backend (binary:3.0.25, cassandra, ccm)	23m 42s
Cassandra backend (binary:3.11.16, cassandra, ccm)	25m 2s
HTTP Management (binary:4.0.6, ccm, http-api, 1, 1)	38m 17s
Memory backends (binary:3.0.25, local, ccm)	16m 41s
Cassandra backend (binary:4.0.6, cassandra, ccm)	26m 47s
HTTP Management (binary:3.11.16, ccm, http-api, 1, 1)	38m 12s
Memory backends (binary:3.11.16, local, ccm)	22m 13s
Memory backends (binary:4.0.6, local, ccm)	23m 40s
	4h 22m 17s

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