Simplify CommandLine

In the CommandLine,

`config-loader-factory A` is equivalent to `config job.config.loader.factory=A`

`config-loader-properties A=B` is equivalent to `config job.config.loader.properties.A=B`

which is confusing and complicate. 

Remove the usage of --config-loader-factory and --config-loader-properties to consolidate all to use --config to simplify CommandLine.