Description of problem:
Admin console prints error when editing Threading attributes.
Typo in attribute name: time-slice-in-millseconds 


Steps to Reproduce:
    Open Admin console
    Go to Configuration > Teiid > Query Engine > Threads
    Click Edit and Save

Error: 
Internal Server Error

{

    "outcome" => "failed",

    "result" => {"step-1" => {

        "outcome" => "failed",

        "failure-description" => "JBAS014792: Unknown attribute time-slice-in-millseconds",

        "rolled-back" => true

    }},

    "failure-description" => {"JBAS014653: Composite operation failed and was rolled back. Steps that failed:" => {"Operation step-1" => "JBAS014792: Unknown attribute time-slice-in-millseconds"}},

    "rolled-back" => true,

    "response-headers" => {"process-state" => "reload-required"}

}