Merge pull request #857 from MetaMask/i841-RenameMethod

Rename idStoreMigrator method for clarity

app/scripts/keyring-controller.js

@@ -119,7 +119,7 @@ module.exports = class KeyringController extends EventEmitter {
     .then((derivedKey) => {
       key = derivedKey
       this.key = key
-      return this.idStoreMigrator.oldSeedForPassword(password)
+      return this.idStoreMigrator.migratedVaultForPassword(password)
     })
     .then((serialized) => {
       if (serialized && shouldMigrate) {

app/scripts/lib/idStore-migrator.js

@@ -11,7 +11,7 @@ module.exports = class IdentityStoreMigrator {
     }
   }
 
-  oldSeedForPassword (password) {
+  migratedVaultForPassword (password) {
     const hasOldVault = this.hasOldVault()
     const configManager = this.configManager