Change Request/ResponseHeader handling in constructors of service

[wmnsk]

In the current implementation, params inside RequestHeader in each service is given respectively, but it should be given with *RequestHeader to be more flexible and consice in handling services with constructor.

For example,

func NewActivateSessionRequest(ts time.Time, authToken datatypes.NodeID, handle, diag, timeout uint32, auditID string, sig *SignatureData, certs []*SignedSoftwareCertificate, locales []string, userToken *datatypes.ExtensionObject, tokenSig *SignatureData) *ActivateSessionRequest {

should be;

func NewActivateSessionRequest(reqHeader *RequestHeader, sig *SignatureData, certs []*SignedSoftwareCertificate, locales []string, userToken *datatypes.ExtensionObject, tokenSig *SignatureData) *ActivateSessionRequest {

[wmnsk]

Fixed in 33c5219 / PR#84