Application Crypto and BEEFY Support for paired (ECDSA,BLS) crypto (#1815)

Next step in process of making BEEFY being able to generate both ECDSA
and BLS signature after #1705. It allows BEEFY to use a pair of ECDSA
and BLS key as a AuthorityId.

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Co-authored-by: Davide Galassi <davxy@datawok.net>
Co-authored-by: Robert Hambrock <roberthambrock@gmail.com>

substrate/primitives/core/src/bls.rs

@@ -134,7 +134,7 @@ impl<T> Eq for Public<T> {}
 
 impl<T> PartialOrd for Public<T> {
 	fn partial_cmp(&self, other: &Self) -> Option<sp_std::cmp::Ordering> {
-		self.inner.partial_cmp(&other.inner)
+		Some(self.cmp(other))
 	}
 }