Comments, exceptions, and other corrections added to the commands:
GetAirshipsWith MinimumPassengersCommand, PostAirshipCommand and
GetAirshipsByOwnerCommand.

Added protected methods to the AbstractCommand
conflicts resolved


Merge branch 'AppForCommandLine2' of
https://github.com/Lucas-Andrade/Grupo-3-EHL.git into AppForCommandLine2

Conflicts:
	src/airtrafficcontrol/app/appforcommandline/commands/AbstractCommand.java
	src/airtrafficcontrol/app/appforcommandline/commands/getairshipscommands/GetAirshipsByOwnerCommand.java