SDK tests: Do a unitary test for [mxRestClient registerFallback] not an integration/e2e test
SDK tests: Do a unitary test for [mxRestClient registerFallback] not an integration/e2e test

matrix-org/matrix-ios-sdk,matrix-org/matrix-ios-sdk,matrix-org/matrix-ios-sdk,matrix-org/matrix-ios-sdk,matrix-org/matrix-ios-sdk