Investigate and separate current dependencies between Observation's module and the rest of the solver.

[adrianarce-elemwave]

Register are required changes and links to observation's module. Separate all major procedures.

[adrianarce-elemwave]

• Study actual behavior of observation module
• Find efficient solutions that will not slow the program
• Define individual workflow for each probe type/domain (init, update, flush, delete)
• Define general structure
• Add tests for each probe case (init, update, flush, delete)
• Add test for general structure