Use correct ExecutionContext for check_inherents (#9483)

Before we used the `other` context, while we are actually either in the
import or sync context.

substrate/primitives/consensus/common/Cargo.toml

@@ -18,7 +18,7 @@ async-trait = "0.1.42"
 codec = { package = "parity-scale-codec", version = "2.0.0", features = ["derive"] }
 futures = { version = "0.3.1", features = ["thread-pool"] }
 log = "0.4.8"
-sp-core = { path= "../../core", version = "4.0.0-dev"}
+sp-core = { path = "../../core", version = "4.0.0-dev"}
 sp-inherents = { version = "4.0.0-dev", path = "../../inherents" }
 sp-state-machine = { version = "0.10.0-dev", path = "../../state-machine" }
 futures-timer = "3.0.1"

substrate/primitives/consensus/common/src/lib.rs

@@ -75,6 +75,16 @@ pub enum BlockOrigin {
 	File,
 }
 
+impl From<BlockOrigin> for sp_core::ExecutionContext {
+	fn from(origin: BlockOrigin) -> Self {
+		if origin == BlockOrigin::NetworkInitialSync {
+			sp_core::ExecutionContext::Syncing
+		} else {
+			sp_core::ExecutionContext::Importing
+		}
+	}
+}
+
 /// Environment for a Consensus instance.
 ///
 /// Creates proposer instance.