[ABW]: added negative tests for get_follow_count

...enser_api_negative/get_follow_count/bad_account.orig.json

...denser_api_negative/get_follow_count/bad_account.pat.json

...ser_api_negative/get_follow_count/bad_account.tavern.yaml

...ser_api_negative/get_follow_count/empty_account.orig.json

...nser_api_negative/get_follow_count/empty_account.pat.json

...r_api_negative/get_follow_count/empty_account.tavern.yaml

...denser_api_negative/get_follow_count/no_account.orig.json

...ndenser_api_negative/get_follow_count/no_account.pat.json

...nser_api_negative/get_follow_count/no_account.tavern.yaml

...ind/tavern/condenser_api_patterns/get_content/_readme.txt

...rn/condenser_api_patterns/get_content_replies/_readme.txt

...avern/condenser_api_patterns/get_follow_count/_readme.txt