[FIX] Check the request type for not activated sessions
[FIX] Check the request type for not activated sessions

 - Currently when the session is not activated and if close Session
   is requested, the server will return a Bad_SessionNotActivated
   status code
 - In new CTT, this will cause the issue in various conformance units
   such as Security Username Password and session base
 - So modified the SessionNotActivated check to ignore if the request
   is of type CloseSessionRequest

Signed-off-by: Jayanth Velusamy <cc3e9f5840cd85783c661df2080d8099dc5077b9@kalycito.com>

jpfr/open62541,StalderT/open62541,open62541/open62541,StalderT/open62541,open62541/open62541,StalderT/open62541,open62541/open62541,JGrothoff/open62541,open62541/open62541,jpfr/open62541,jpfr/open62541,jpfr/open62541,JGrothoff/open62541,JGrothoff/open62541,JGrothoff/open62541,StalderT/open62541