fix(client): The server can send no ServerCertificate in the asym hea… #1599

Job	Run time
Debug Build & Unit Tests (gcc)	3m 2s
Debug Build & Unit Tests (gcc, 32bit)	3m 6s
Debug Build & Unit Tests without Subscriptions (gcc)	1m 59s
Debug Build & Unit Tests with Diagnostics (gcc)	2m 59s
Debug Build & Unit Tests with multithreading (gcc)	2m 45s
Debug Build & Unit Tests with Alarms&Conditions (gcc)	10m 57s
Debug Build & Unit Tests (clang)	4m 14s
Debug Build & Unit Tests (tcc)	2m 28s
Encryption (MbedTLS) Build & Unit Tests (gcc)	3m 4s
PubSub Encryption (MbedTLS) Build & Unit Tests (gcc)	3m 15s
PubSub SKS Build & Unit Tests (gcc)	7m 53s
Encryption (OpenSSL) Build & Unit Tests (gcc)	2m 56s
Encryption (LibreSSL) Build & Unit Tests (gcc)	5m 52s
TPM Tool Build	2m 31s
Release Build	1m 22s
Amalgamation Build	49s
Amalgamation Build with Multithreading	59s
Valgrind Build & Unit Tests with MbedTLS (gcc)	16m 18s
Valgrind Build & Unit Tests with OpenSSL (gcc)	12m 44s
Valgrind Examples with MbedTLS (gcc)	59m 2s
Valgrind Examples with OpenSSL (gcc)	58m 47s
Clang Static Analyzer	3m 49s
Build All Companion Specifications	9m 25s
	3h 40m 16s

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