Feature/change redis struct

[MahdiPresario001]

• Responses not longer go through redis pubsub, but a response queue is created for each query, with a TTL
• Contenders selection for organic queries:

• Only keep contenders who make less than 1% 500s

• Take the number of REQUESTS_429 in consideration too for selection

• switch from redis to hiredis for better performance
• change factory config function to use a global var
• passing psqldb connection instead of the entire psql db variable to psql functions (contenders selection mainly)

[namoray]

Any reason for this?

[namoray]

Only issue with this is the cache is not configurable now.

Is there any benefit over the other solution? looks to be doing the exact same thing but with two funcs and global var as opposed to one function

[MahdiPresario001]

the psql connection errors were solved by this. was proposed by @narigama
it's cleaner this way, we only create the config once, no caching needed (which was causing many issues)

[namoray]

LGTM apart from the cache stuff, not sure if/why we need to do that