Templates with no parameters

Titan does not support templates with no parameters. It seems that other TTCN compilers do. Maybe a good addition for better compatibility? I haven't checked which is right or wrong by the standards but.

For example, this existing code from ISO15118-4 causes a compiler error in Titan: template BodyElement_group m_CMN_CMN_AuthorizationReq_001() := {
authorizationReq := {
genChallenge := omit,
id := omit
}
}