Omitting --homedir results in server not finding modules

[jdrueckert]

What you were trying to do

Start a headless server and override its default configuration.

./gradlew server --args="--override-default-config=override.cfg"

What actually happened

The server failed to start the game.

How to reproduce

1. Run ./gradlew server and notice that the server starts successfully
   [main] INFO o.t.e.n.internal.NetworkSystemImpl - Started server on port 25777
2. Stop the server
3. Run ./gradlew server --args="--override-default-config=override.cfg" and notice that it cannot find modules and fails to start
   [main] WARN o.t.e.c.m.loadProcesses.RegisterMods - Missing at least one required module (or dependency) from the following list: [BiomesAPI, Thirst, StructureTemplates, Furnishings, CoreRendering, AnotherWorld, Health, CoreSampleGameplay, Inventory, Explosives, CoreWorlds, CoreAdvancedAssets, Drops, StructuralResources, AnotherWorldPlants, engine, ClimateConditions, AlterationEffects, Fluid, CoreAssets, PlantPack, GrowingFlora]
4. Run ./gradlew server --args="--override-default-config=override.cfg --homedir terasology-server" and notice that the server starts successfully

Workaround

Specify the home directory with --homedir

./gradlew server --args="--override-default-config=override.cfg --homedir terasology-server"

Additional Context

Note, that you may need to take additional actions due to #4956 and #4957