Directory Restructure (#1163)

* Move tests -> testing

* Directory restructure

* Update Cargo.toml during restructure

* Update Makefile during restructure

* Fix arbitrary path

consensus/state_processing/src/per_epoch_processing/tests.rs

@@ -0,0 +1,23 @@
+#![cfg(test)]
+use crate::per_epoch_processing::per_epoch_processing;
+use env_logger::{Builder, Env};
+use types::test_utils::TestingBeaconStateBuilder;
+use types::*;
+
+#[test]
+fn runs_without_error() {
+    Builder::from_env(Env::default().default_filter_or("error")).init();
+
+    let spec = MinimalEthSpec::default_spec();
+
+    let mut builder: TestingBeaconStateBuilder<MinimalEthSpec> =
+        TestingBeaconStateBuilder::from_deterministic_keypairs(8, &spec);
+
+    let target_slot =
+        (MinimalEthSpec::genesis_epoch() + 4).end_slot(MinimalEthSpec::slots_per_epoch());
+    builder.teleport_to_slot(target_slot);
+
+    let (mut state, _keypairs) = builder.build();
+
+    per_epoch_processing(&mut state, &spec).unwrap();
+}