SEC18 — SecurityReplaceable module errors in Security spec 1.7

There are a few errors in the IDL listed in the Security Service 1.7
spec in the SecurityReplaceable module. They are:

1. In the Vault interface:

Security::AuthenticationMethodList
get_supported_authen_methods(
in Security::MechanismType mechanism;
);

There is an extraneous semi-colon after the MechanismType
parameter. This should be:

Security::AuthenticationMethodList
get_supported_authen_methods(
in Security::MechanismType mechanism
);

2. In the SecurityContext interface:

boolean process_discard_token (
in Security::OpaqueBuffer discard_token,
);

There is an extraneous comma after the OpaqueBuffer parameter. This
should be:

boolean process_discard_token (
in Security::OpaqueBuffer discard_token
);

close with revised text