Remove technologies as domain entity

[enriquezrene]

We have defined technologies as a domain entity comprised of two fields. We analyzed the stack-exchange API and we have decided to read all the technologies available in that API to be used when users are creating new time-entry objects (check ioet/time-tracker-ui#29). Taking this idea into account, we need to remove the technology domain object form the OpenApi specification and use a string array as part of technologies during the time-entry domain object creation.

Acceptance Criteria

• Remove the technology domain object from project
• Remove all the associated namespaces and other files
• Make sure the generated swagger file has no references to this removed domain object
• time-entry objects should be created using an array of strings instead of technology objects.
• Remove any other associated dependency if that exists

[ralden]

@enriquezrene In what sense is technologies no longer a "domain entity"? It sounds like you have changed the implementation and maybe the stored representation. But technologies is still an important concept in the domain; one that will probably change again in the future. Seems like it really should be fully encapsulated.