WCPL get_packages function update to support new WCPL filenames

wc.php

/**
 * Get packages in Field Editor format
 *
 *
 * @since 1.2.2
 *
 * @param bool $as_array
 *
 * @return array|string
 */
static function get_packages( $as_array = FALSE ) {

	$fpackages = array();

	if( ! class_exists( 'WP_Job_Manager_WCPL_Submit_Job_Form' ) ) {
		if( ! defined( 'JOB_MANAGER_WCPL_PLUGIN_DIR' ) ) return false;
		$legacy_file = JOB_MANAGER_WCPL_PLUGIN_DIR . '/includes/class-wp-job-manager-wcpl-submit-job-form.php';
		$new_file = JOB_MANAGER_WCPL_PLUGIN_DIR . '/includes/class-wc-paid-listings-submit-job-form.php';

		if( file_exists( $new_file ) ){
			include( $new_file );
		}elseif( file_exists( $legacy_file ) ){
			include( $legacy_file );
		} else{
			return false;
		}

	}
	
	$packages = WP_Job_Manager_WCPL_Submit_Job_Form::get_packages();

	if( ! $packages ) return false;

	foreach ( $packages as $key => $package ) {
		$product = get_product( $package );
		// Skip if not job package
		if ( ! $product->is_type( array( 'job_package', 'job_package_subscription', 'subscription' ) ) ) continue;

		$fpackages[ $product->id ] = $product->get_title();
	}

	if ( ! $as_array ) {
		$options = new WP_Job_Manager_Field_Editor_Fields_Options();
		return $options->convert( $fpackages );
	}

	return $fpackages;
}