removal of RAN5 CR references

Test cases for IMS eCall and MCPTT have been requested by RAN5, which require updates to LibSip and MIME body type definitions by 3GPP TF160

---------------------------------------------------

New eCall TCs require an update of MIME type defs :
- Container for MSD data
- MIME field Content-ID
See R5-174537 based on main eCall RFC 8847

---------------------------------------------------

MCPTT default message contents in R5-173766 (TS 36579-1 v.0.2.0) require following new headers:
- Answer-Mode RFC 5373
- Priv-Answer-Mode RFC 5373
- Resource-Priority RFC 4412
- Target-Dialog RFC 4538
- P-Answer-State RFC 4964

during validation return value of isvalue function was not correct even if recordRoute field had value

-------------------------------------
          - import statements changed to avoid circular imports
            - import of LibSip_Common
            - types of LibSip_Common are commented out (Charstring_List, GenValue, GenericParam, SemicolonParam_List, AmpersandParam_List, CommaParam_List)
          - import statements changed to avoid dependency of PIXITs
            - import of LibSip_PIXITS commented out
            - c_mimeMultipart commented out
          - definition of DisplayName added
          - NameAddr changed to use DisplayName instead charstring (acc. to R5w140111)
          - featureCaps restored in MessageHeader
          - encoding rule "SIPCodec" added to types Request, *_Request, RequestUnion, Response (note: how to deal with this in the future is FFS)

Inputs from TTCN-3 users added by STF471
........
Update to user input, after compilation with another ttcn-3 compiler
........
Deprecated module parameter group notation updated
........
LibIMS update modifications extending to LibSIP
........
More template restrictions for LibSIP_Templates
........
Changed vc_route from template to template(omit).
Minor fix.
........
Further fixes.
........
STF471: Unifies templates (step1)
........
STF471: Unifies templates (step2)
........
STF471: Unifies templates (step3)
........
STF471: Unifies templates (step4)
........
LibSIP update:
* sizeof() -> lengthof()
* template restrictions added for template parameters where possible
........
STF471: Unifies templates (step5)
........
Merge rev. 565/566
........
template restrictions added for LibSIP_SMS templates
........
STF471: Unifies templates (step6)
........
Changed vc_route_REG from template to template(omit).
........
STF471: Add PIXITs templates
STF471: source formatting (step1)
........
Further reduction of warnings.
........
Updates for LibSip modification after compilation with another tool
........
Replaced ispresent->isvalue in LibSIP
........
Using template m_cSeq from SIP instead of local IMS one.
........
move *.ttcn3view files to dedicated folder
........
Merge with changes done by STF467
........
Removed invalid group end.
........
Introduced mw_Response_xxx_Base templates.
........
Introduced mw_Response_StatusCode_Base.
........
More template restrictions added where possible
........
Initial formatting.
........
Default parameter values added, where possible
........
Initial ATS specific modulepar removal result
........
Updated issues identified by T3Q 
........
The rest of issues identified by T3Q
........
Another round of PIXIT removal
........
encoding attribute updated
........
Merge code with STF467 (session week#12)
........
Fixed compilation problems.
Calling f_selfOrClientSyncAndVerdict is now commented and needs to be checked!
........
SipComponent now extends from SelfSyncComp to allow usage of LibCommon_Sync functionality.
........
Container module importing all known LibSip modules in a public way, so the imports will be visible for all modules importing the LibSip_Library module.
........
Removed explicit usage of PX_SIP_TACK, PX_SIP_TRESP as the component timer is implicitely initialized with the module parameter values.
........
XSD files refreshed and common formatting applied
........
sizeof->lengthof
........
STF160 proposed modifications applied to LibSIP
........
opaque param related TODO-s removed
........
update of RFC3891 to separate mandatory callid from optional replacesParams
........
add of file descriptions for t3doc
........
add short descriptions for t3doc
........
update of the file headers for STF471
........

Removed explicit usage of PX_SIP_TACK, PX_SIP_TRESP as the component timer is implicitely initialized with the module parameter values.

Container module importing all known LibSip modules in a public way, so the imports will be visible for all modules importing the LibSip_Library module.

Calling f_selfOrClientSyncAndVerdict is now commented and needs to be checked!

1/ Several synchronization bugs fixed in TTCN-3 code
2/ Add support of GRUU
3/ Add support of tokenized-by parameter
4/ Bye sequence for SUB and TAR were incorrect