Prevent undeclared public network access

Stop a few tests which aren't marked with `public_network_test` from
trying to access crates.io. While doing so, also make sure that other
`cargo_add` and `cargo_info` tests initialize the registry.

Author: sebastianpoeplau

tests/testsuite/cargo_add/add_no_vendored_package_with_vendor/mod.rs

@@ -7,6 +7,7 @@ use cargo_test_support::Project;
 
 #[cargo_test]
 fn case() {
+    cargo_test_support::registry::init();
     let project = Project::from_template(current_dir!().join("in"));
     let project_root = project.root();
     let cwd = &project_root;

tests/testsuite/cargo_add/add_toolchain/mod.rs

@@ -7,6 +7,7 @@ use cargo_test_support::Project;
 
 #[cargo_test]
 fn case() {
+    cargo_test_support::registry::init();
     let project = Project::from_template(current_dir!().join("in"));
     let project_root = project.root();
     let cwd = &project_root;

tests/testsuite/cargo_add/dev_existing_path_base/mod.rs

@@ -7,6 +7,7 @@ use cargo_test_support::Project;
 
 #[cargo_test]
 fn case() {
+    cargo_test_support::registry::init();
     let project = Project::from_template(current_dir!().join("in"));
     let project_root = project.root();
     let cwd = project_root.join("primary");

tests/testsuite/cargo_add/invalid_key_inherit_dependency/mod.rs

@@ -7,6 +7,7 @@ use cargo_test_support::Project;
 
 #[cargo_test]
 fn case() {
+    cargo_test_support::registry::init();
     let project = Project::from_template(current_dir!().join("in"));
     let project_root = project.root();
     let cwd = &project_root;

tests/testsuite/cargo_add/invalid_key_overwrite_inherit_dependency/mod.rs

@@ -7,6 +7,7 @@ use cargo_test_support::Project;
 
 #[cargo_test]
 fn case() {
+    cargo_test_support::registry::init();
     let project = Project::from_template(current_dir!().join("in"));
     let project_root = project.root();
     let cwd = &project_root;

tests/testsuite/cargo_add/invalid_key_rename_inherit_dependency/mod.rs

@@ -7,6 +7,7 @@ use cargo_test_support::Project;
 
 #[cargo_test]
 fn case() {
+    cargo_test_support::registry::init();
     let project = Project::from_template(current_dir!().join("in"));
     let project_root = project.root();
     let cwd = &project_root;

tests/testsuite/cargo_add/merge_activated_features/mod.rs

@@ -7,6 +7,7 @@ use cargo_test_support::Project;
 
 #[cargo_test]
 fn case() {
+    cargo_test_support::registry::init();
     let project = Project::from_template(current_dir!().join("in"));
     let project_root = project.root();
     let cwd = &project_root;

tests/testsuite/cargo_add/normalize_name_path_existing/mod.rs

@@ -7,6 +7,7 @@ use cargo_test_support::Project;
 
 #[cargo_test]
 fn case() {
+    cargo_test_support::registry::init();
     let project = Project::from_template(current_dir!().join("in"));
     let project_root = project.root();
     let cwd = &project_root;

tests/testsuite/cargo_add/normalize_name_path_existing/stderr.term.svg

@@ -7,6 +7,7 @@ use cargo_test_support::Project;
 
 #[cargo_test]
 fn case() {
+    cargo_test_support::registry::init();
     let project = Project::from_template(current_dir!().join("in"));
     let project_root = project.root();
     let cwd = project_root.join("primary");