Allow multiple devices to be compiled

[cochicde]

The deafult cases falls to RMT_DEV, but the default can be set via cmake using DFORTE_DEVICE_DEFAULT. For now, the RMT_DEV is always compiled. The opcua one is compiled by default whenever the opcua layer is compiled, but can be disabled with FORTE_DISABLE_OPCUA_DEV.

The FakeTimeDev device is compile if the FAKE_TIME is enabled.

should be at least a partial fix to #270

[azoitl]

Can we have an optimisation that if there is only one device configured that we don't need the factory or the factory is optimized to use less code that can be optimized away.

[cochicde]

Can we have an optimisation that if there is only one device configured that we don't need the factory or the factory is optimized to use less code that can be optimized away.

I tried a solutionn regarding this in the last commit. I added a define variable if we are using one or many devices, and the deviceFactoy.h then has two flavors, one for each case. If a single device is used, the createDevice method has a direct return as it was before. I hope this is optmized by the compiler. If many devices are used, the more complex factory is compile together with the cpp.

The command line parameter is also not implemente if only one device is compiled

[azoitl]

I just see we have conflicts now. Could you please locally rebase on top of develop and force push to resolve it.