[1.1.0] LMDB Naming consistency fix (#2656)

* allow separate db name in store creation

* rustfmt

* fixes to db paths to ensure consistency with 1.0.x

p2p/src/store.rs

@@ -22,6 +22,7 @@ use crate::core::ser::{self, Readable, Reader, Writeable, Writer};
 use crate::types::{Capabilities, PeerAddr, ReasonForBan};
 use grin_store::{self, option_to_not_found, to_key, Error};
 
+const DB_NAME: &'static str = "peer";
 const STORE_SUBPATH: &'static str = "peers";
 
 const PEER_PREFIX: u8 = 'P' as u8;
@@ -115,7 +116,7 @@ pub struct PeerStore {
 impl PeerStore {
 	/// Instantiates a new peer store under the provided root path.
 	pub fn new(db_root: &str) -> Result<PeerStore, Error> {
-		let db = grin_store::Store::new(db_root, Some(STORE_SUBPATH), None)?;
+		let db = grin_store::Store::new(db_root, Some(DB_NAME), Some(STORE_SUBPATH), None)?;
 		Ok(PeerStore { db: db })
 	}