Decouple rocksdb dependency from ethcore (#8320)

* Move client DB opening logic to CLI

* Move restoration db open logic to CLI

This adds KeyValueDBHandler which handles opening a new database, thus allow us to move the restoration db open logic
out of ethcore.

* Move rocksdb's compactionprofile conversion to CLI

* Move kvdb_rocksdb as test dependency for ethcore

* Fix tests due to interface change

* Fix service tests

* Remove unused migration dep for ethcore

ethcore/src/client/config.rs

@@ -15,13 +15,11 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 use std::str::FromStr;
-use std::path::Path;
 use std::fmt::{Display, Formatter, Error as FmtError};
 
 use mode::Mode as IpcMode;
 use verification::{VerifierType, QueueConfig};
 use journaldb;
-use kvdb_rocksdb::CompactionProfile;
 
 pub use std::time::Duration;
 pub use blockchain::Config as BlockChainConfig;
@@ -45,17 +43,6 @@ impl Default for DatabaseCompactionProfile {
 	}
 }
 
-impl DatabaseCompactionProfile {
-	/// Returns corresponding compaction profile.
-	pub fn compaction_profile(&self, db_path: &Path) -> CompactionProfile {
-		match *self {
-			DatabaseCompactionProfile::Auto => CompactionProfile::auto(db_path),
-			DatabaseCompactionProfile::SSD => CompactionProfile::ssd(),
-			DatabaseCompactionProfile::HDD => CompactionProfile::hdd(),
-		}
-	}
-}
-
 impl FromStr for DatabaseCompactionProfile {
 	type Err = String;