Add Configuration for Passing System Properties to Jobs

[marevol]

We need to add a configuration option to specify whether to pass system properties to jobs. This feature will enhance flexibility and control over job executions by allowing users to filter and pass specific system properties based on a regex pattern.

Changes:

• Added a new method addFessCustomSystemProperties in ExecJob class.
• Updated CrawlJob, GenerateThumbnailJob, and SuggestJob to include the new method.
• Introduced a new configuration key job.system.property.filter.pattern in FessConfig.
• Implemented getter methods for the new configuration key in FessConfig.
• Added the new configuration key to fess_config.properties.