Operation which require server reload should check if something was changed

Description of problem:
Server reload is required even if nothing was actually changed. This could have negative impact on usability of WildFly.

Steps to Reproduce:

• start standalone
• connect to cli
• run: /subsystem=jpa:write-attribute(name=default-extended-persistence-inheritance, value=SHALLOW)
• reload server
• run: /subsystem=jpa:write-attribute(name=default-extended-persistence-inheritance, value=SHALLOW)

Actual results:
{
"outcome" => "success",
"response-headers" =>

{ "operation-requires-reload" => true, "process-state" => "reload-required" }

}
Expected results:

• reload is not required