refactor(server): Simplify naming conventions in the DiscoveryManager #1069

Job	Run time
Debug Build & Unit Tests (gcc)	3m 0s
Debug Build & Unit Tests (gcc, 32bit)	1s
Debug Build & Unit Tests without Subscriptions (gcc)	1m 25s
Debug Build & Unit Tests with Diagnostics (gcc)	3m 19s
Debug Build & Unit Tests with multithreading (gcc)	1m 56s
Debug Build & Unit Tests with Alarms&Conditions (gcc)	12m 23s
Debug Build & Unit Tests (clang)	3m 52s
Debug Build & Unit Tests (tcc)	1s
Encryption (MbedTLS) Build & Unit Tests (gcc)	2m 18s
PubSub Encryption (MbedTLS) Build & Unit Tests (gcc)	3m 8s
PubSub SKS Build & Unit Tests (gcc)	1s
Encryption (OpenSSL) Build & Unit Tests (gcc)	2m 18s
Encryption (LibreSSL) Build & Unit Tests (gcc)	4m 48s
TPM Tool Build	2m 13s
Release Build	1m 13s
Amalgamation Build	49s
Amalgamation Build with Multithreading	46s
Valgrind Build & Unit Tests with MbedTLS (gcc)	27m 34s
Valgrind Build & Unit Tests with OpenSSL (gcc)	12m 37s
Valgrind Examples with MbedTLS (gcc)	35m 26s
Valgrind Examples with OpenSSL (gcc)	26m 8s
Clang Static Analyzer	4m 40s
Build All Companion Specifications	18m 2s
	2h 47m 58s

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