Share REQUEST_INTERVAL

Share this code either in a new module called ncbi.py or existing utils.py, whichever makes more sense. Import into taxid and isolate modules.

virtool-cli/virtool_cli/isolate.py

Lines 17 to 20 in d8b51e8

    
           Entrez.email = os.environ.get("NCBI_EMAIL") 
        
           Entrez.api_key = os.environ.get("NCBI_API_KEY") 
        
           REQUEST_INTERVAL = 0.4 if Entrez.email and Entrez.api_key else 0.6

	Entrez.email = os.environ.get("NCBI_EMAIL")
	Entrez.api_key = os.environ.get("NCBI_API_KEY")

	REQUEST_INTERVAL = 0.4 if Entrez.email and Entrez.api_key else 0.6