Added functional test for DB_PASSWORD

Author: UmeshSingla

features/config-create.feature

@@ -293,3 +293,12 @@ Feature: Create a wp-config file
       PasswordWith'SingleQuotes'
       """
 
+  Scenario: Correct config file is generated when database password has double quote in it
+    Given an empty directory
+    And WP files
+
+    When I run `wp config create --skip-check --dbname=somedb --dbuser=someuser --dbpass='p@(ss){w0r?d><}"!With"DoubleQuotes'`
+    Then the wp-config.php file should contain:
+      """
+      define( 'DB_PASSWORD', 'p@(ss){w0r?d><}"!With"DoubleQuotes' )
+      """

src/Config_Command.php

@@ -340,7 +340,7 @@ public function create( $_, $assoc_args ) {
 				}
 			}
 		} catch ( Exception $exception ) {
-			//Remove the default moustache wp-config.php template file.
+			// Remove the default moustache wp-config.php template file.
 			if ( file_exists( $assoc_args['config-file'] ) ) {
 				unlink( $path );
 			}