Test doc_create_with_policy_grants failing

[giarc3]

Error:

---- doc_create_with_policy_grants stdout ----
Error: RequestServerErrors { errors: [ServerError { message: "Validating user signature failed with \'Body signature was invalid.\'", code: 4 }], code: PolicyGet, http_status: Some(403) }
thread 'doc_create_with_policy_grants' panicked at 'assertion failed: `(left == right)`
  left: `1`,
 right: `0`: the test returned a termination value with a non-zero status code (1) which indicates a failure', /home/craig/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/test/src/lib.rs:192:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

[giarc3]

This test worked in CI on the 22nd, and failed everywhere on the 24th.
The request that's failing is for an empty policy, for which ironoxide makes a request to /api/1/policies?. It looks like the ? at the end has started getting stripped before the request reaches the server sometime between the 22nd and 24th. We're looking into reasons that may have happened (Cloudflare?).
For now, we should fix ironoxide's logic so that requests don't end with ? when there are no query parameters.