Fix for functionnames where functionname A startwith functionname B

.find would find wrong versionname and aliasname

Author: MartinRisk

lib/stackops/apiGateway.js

@@ -278,8 +278,8 @@ module.exports = function(currentTemplate, aliasStackTemplates, currentAliasStac
 		// Adjust permission to reference the function aliases
 		_.forOwn(apiLambdaPermissions, (permission, name) => {
 			const functionName = _.replace(name, /LambdaPermissionApiGateway$/, '');
-			const versionName = _.find(_.keys(versions), version => _.startsWith(version, functionName));
-			const aliasName = _.find(_.keys(aliases), alias => _.startsWith(alias, functionName));
+			const versionName = _.find(_.keys(versions), version => _.startsWith(version, `${functionName}LambdaVersion`));
+			const aliasName = _.find(_.keys(aliases), alias => _.startsWith(alias, `${functionName}Alias`));
 			const isExternalRef = isExternalRefAuthorizerPredicate(permission.Properties.FunctionName); 
 
 			// Adjust references and alias permissions