refactor(examples): server_ctt uses "static" variables that always co… #1049

Job	Run time
Debug Build & Unit Tests (gcc)	1m 3s
Debug Build & Unit Tests (gcc, 32bit)	1m 44s
Debug Build & Unit Tests without Subscriptions (gcc)	33s
Debug Build & Unit Tests with Diagnostics (gcc)	1m 0s
Debug Build & Unit Tests with multithreading (gcc)	49s
Debug Build & Unit Tests with Alarms&Conditions (gcc)	3m 8s
Debug Build & Unit Tests (clang)	2m 32s
Debug Build & Unit Tests (tcc)	38s
Encryption (MbedTLS) Build & Unit Tests (gcc)	48s
PubSub Encryption (MbedTLS) Build & Unit Tests (gcc)	1m 35s
PubSub SKS Build & Unit Tests (gcc)	3m 15s
Encryption (OpenSSL) Build & Unit Tests (gcc)	1m 11s
Encryption (LibreSSL) Build & Unit Tests (gcc)	4m 56s
TPM Tool Build	2m 15s
Release Build	2m 52s
Amalgamation Build	44s
Amalgamation Build with Multithreading	1m 8s
Valgrind Build & Unit Tests with MbedTLS (gcc)	1m 22s
Valgrind Build & Unit Tests with OpenSSL (gcc)	1m 29s
Valgrind Examples with MbedTLS (gcc)	1h 12m 46s
Valgrind Examples with OpenSSL (gcc)	1h 2m 34s
Clang Static Analyzer	4m 36s
Build All Companion Specifications	9m 7s
	3h 2m 5s

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