Avoid initializing the playback proxy for a few remaining tests

This list was obtained by temporarily causing playback to panic if
there was no `http-data` file when the proxy is started.

The only remaining test that starts a proxy server which goes unused is
`krate::yank_not_owner`, however this test does need an index.  If more
tests fall into this category over time we can switch to a full builder
API for orchestrating a `TestApp` but that doesn't seem necessary yet.

src/tests/krate.rs

@@ -1066,7 +1066,7 @@ fn new_krate_with_readme() {
 
 #[test]
 fn new_krate_without_any_email_fails() {
-    let (app, _, _, token) = TestApp::with_proxy().with_token();
+    let (app, _, _, token) = TestApp::init().with_token();
 
     app.db(|conn| {
         delete(emails::table).execute(conn).unwrap();
@@ -1087,7 +1087,7 @@ fn new_krate_without_any_email_fails() {
 
 #[test]
 fn new_krate_with_unverified_email_fails() {
-    let (app, _, _, token) = TestApp::with_proxy().with_token();
+    let (app, _, _, token) = TestApp::init().with_token();
 
     app.db(|conn| {
         update(emails::table)
@@ -1201,7 +1201,7 @@ fn summary_new_crates() {
 #[test]
 fn download() {
     use chrono::{Duration, Utc};
-    let (app, anon, user) = TestApp::with_proxy().with_user();
+    let (app, anon, user) = TestApp::init().with_user();
     let user = user.as_model();
 
     app.db(|conn| {
@@ -1253,7 +1253,7 @@ fn download() {
 
 #[test]
 fn download_nonexistent_version_of_existing_crate_404s() {
-    let (app, anon, user) = TestApp::with_proxy().with_user();
+    let (app, anon, user) = TestApp::init().with_user();
     let user = user.as_model();
 
     app.db(|conn| {

src/tests/read_only_mode.rs

@@ -32,7 +32,7 @@ fn cannot_hit_endpoint_which_writes_db_in_read_only_mode() {
 
 #[test]
 fn can_download_crate_in_read_only_mode() {
-    let (app, anon, user) = TestApp::with_proxy().with_user();
+    let (app, anon, user) = TestApp::init().with_user();
 
     app.db(|conn| {
         CrateBuilder::new("foo_download_read_only", user.as_model().id)