Unable to pass Provider to HMAC SignatureMethod

org.jcp.xml.dsig.internal.dom.DOMHMACSignatureMethod#sign method doesn't check if we passed Provider in XMLSignContext like org.jcp.xml.dsig.internal.dom.DOMSignatureMethod#sign does.

All signature methods should allow for using passed Provider

    Provider p = (Provider)context.getProperty
            ("org.jcp.xml.dsig.internal.dom.SignatureProvider");