Keystore 2.0: Make per boot database an in memory db.

Test: keystore2_test
Change-Id: I1ce8ca517af2dc2777cbb23b52ea6a8df89cc99d
diff --git a/keystore2/src/keystore2_main.rs b/keystore2/src/keystore2_main.rs
index 2ea41aa..fbf500a 100644
--- a/keystore2/src/keystore2_main.rs
+++ b/keystore2/src/keystore2_main.rs
@@ -39,6 +39,10 @@
     // Saying hi.
     info!("Keystore2 is starting.");
 
+    // Initialize the per boot database.
+    let _keep_me_alive = keystore2::database::KeystoreDB::keep_perboot_db_alive()
+        .expect("Failed to initialize the perboot database.");
+
     let mut args = std::env::args();
     args.next().expect("That's odd. How is there not even a first argument?");