Release v1.4.0

See merge request oai/cn5g/oai-cn5g-amf!135

* Fix SCTP NG Shutdown issue
* Fix 100% CPU consumption issue
* Fix RAN UE ID display
* Fix issue for TMSI and GUTI value
* Fix for handling S-NSSAI
* Remove OPC value from AMF configuration
* Support for Ubuntu 20.04 bare-metal installation
* Official images produced by CI are pushed to `oaisoftwarealliance` Docker-Hub Team account
* Reduce image size

Fix decode SD/HPLMNSD in NAS

See merge request oai/cn5g/oai-cn5g-amf!134

Fix RAN UE ID display

See merge request oai/cn5g/oai-cn5g-amf!133

Fix sd log

See merge request oai/cn5g/oai-cn5g-amf!132

Do not display SD_NO_VALUE

See merge request oai/cn5g/oai-cn5g-amf!131

Minor fix to ignore SD for standard SST value for the moment (TODO: for standard SST value with SD)

See merge request oai/cn5g/oai-cn5g-amf!130

Amf configuration nssai

See merge request oai/cn5g/oai-cn5g-amf!129

AMF's configuration: remove SD for standardize SST

See merge request oai/cn5g/oai-cn5g-amf!128

Remove SMF_client lib

See merge request oai/cn5g/oai-cn5g-amf!127

Fix config display

See merge request oai/cn5g/oai-cn5g-amf!126

Custom api configuration

See merge request oai/cn5g/oai-cn5g-amf!125

Fix for snssai default parameters in config

See merge request oai/cn5g/oai-cn5g-amf!124

# Conflicts:
#   scripts/entrypoint.sh

Remove OPC info from conf file

See merge request oai/cn5g/oai-cn5g-amf!123

Fix sd optional

See merge request oai/cn5g/oai-cn5g-amf!122