Break appcrypto dep cycle (#4347)

* move application-crypto tests into seperate crate

* Fix crate name, update script and add docs

* pressing 'save' helps

* remove useless lines

* adding header

* split into actual modules

substrate/primitives/application-crypto/test/src/lib.rs

@@ -0,0 +1,22 @@
+// Copyright 2019 Parity Technologies (UK) Ltd.
+// This file is part of Substrate.
+
+// Substrate is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Substrate is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Substrate.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Integration tests for application crypto
+
+#[cfg(test)]
+mod ed25519;
+#[cfg(test)]
+mod sr25519;