Directory Restructure (#1163)

* Move tests -> testing

* Directory restructure

* Update Cargo.toml during restructure

* Update Makefile during restructure

* Fix arbitrary path

common/eth2_interop_keypairs/tests/from_file.rs

@@ -0,0 +1,23 @@
+#![cfg(test)]
+use eth2_interop_keypairs::{keypair as reference_keypair, keypairs_from_yaml_file};
+use std::path::PathBuf;
+
+fn yaml_path() -> PathBuf {
+    PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+        .join("specs")
+        .join("keygen_10_validators.yaml")
+}
+
+#[test]
+fn load_from_yaml() {
+    let keypairs = keypairs_from_yaml_file(yaml_path()).expect("should read keypairs from file");
+
+    keypairs.into_iter().enumerate().for_each(|(i, keypair)| {
+        assert_eq!(
+            keypair,
+            reference_keypair(i),
+            "Decoded key {} does not match generated key",
+            i
+        )
+    });
+}