server: Initial stab at e2e tests (#534)

Initial end to end testing. generates unique names for user and groups, and all tests run serially

server/tests/common/auth.rs

@@ -0,0 +1,27 @@
+use crate::common::env;
+use reqwest::blocking::Client;
+
+pub fn get_token(client: &Client) -> String {
+    let username = env::admin_dn();
+    let password = env::admin_password();
+    let base_url = env::http_url();
+    let response = client
+        .post(format!("{base_url}/auth/simple/login"))
+        .header(reqwest::header::CONTENT_TYPE, "application/json")
+        .body(
+            serde_json::to_string(&lldap_auth::login::ClientSimpleLoginRequest {
+                username,
+                password,
+            })
+            .expect("Failed to encode the username/password as json to log in"),
+        )
+        .send()
+        .expect("Failed to send auth request")
+        .error_for_status()
+        .expect("Auth attempt failed");
+    serde_json::from_str::<lldap_auth::login::ServerLoginResponse>(
+        &response.text().expect("Failed to get response text"),
+    )
+    .expect("Failed to parse json")
+    .token
+}