Update the tests and documentation to reflect the fact that the service functions are now properly returning the ST[1, 4] failed start of execution notification when needed

Closes #14
Closes #8

Ecss telemetry packet `parseTM`

See merge request acubesat/obc/ecss-services!19

# Conflicts:
#	src/Services/EventActionService.cpp

Remove unnecessary #define CATCH_CONFIG_MAIN from parameter service test. Also fix a random typo @ MemoryManagementService's javadoc.

setup, more info on numOfValidIds() source

Replace the if's used for message type checking with proper error-handler-controlled assertions. One test needs updating to use the error handler's output.

Remove unnecessary #define CATCH_CONFIG_MAIN from parameter service test. Also fix a random typo @ MemoryManagementService's javadoc.

Fixed a bug: In utcTime function, when the year was leap year, the extra day was substracted two times instead of one.

and some test values that were wrong
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Ready to merge

Added a function that converts elapsed seconds since Unix epoch to UTC date and the mission-specific function has been implemented

setup, more info on numOfValidIds() source