Convert hard coded plugins in config to Dict type

[VakarisZ]

Refactor

Some hard-coded plugins have a different format in the agent configuration schema from other plugins. This inconsistency results in a lot of needless code all over the place.

Tasks

• [ ] Refactor credential collectors to Dict
  • [ ] Change AgentConfigurationSchema
  • [ ] Change BB test configs
  • [ ] Change UT data
• [ ] Refactor fingerprinters to Dict
  • [ ] Change AgentConfigurationSchema
  • [ ] Change BB test configs
  • [ ] Change UT data
  • [ ] Change infection_monkey.master.propagator.Propagator._add_http_ports_to_fingerprinters
• [ ] Replace advanced selectors with PluginObjectFieldTemplate
• [ ] Change safe option validator

[mssalvatore]

In v2.3.0, there will be no more hard-coded plugins.