Provides an attribute-based comparison (no ID comparison) - incurred <em>only</em> when 'this' or the
session object being compared for equality do not have a session id.
@param ss the SimpleSession instance to compare for equality.
@return true if all the attributes, except the id, are equal to this object's attributes.
Provides an attribute-based comparison (no ID comparison) - incurred <em>only</em> when 'this' or the session object being compared for equality do not have a session id.
@param ss the SimpleSession instance to compare for equality. @return true if all the attributes, except the id, are equal to this object's attributes.