[AIRFLOW-2597] Restore original dbapi.run() behavior
[AIRFLOW-2597] Restore original dbapi.run() behavior

Closes #3490 from yrqls21/kevin_yang_fix_ci

wooga/airflow,mistercrunch/airflow,nathanielvarona/airflow,jgao54/airflow,sergiohgz/incubator-airflow,dhuang/incubator-airflow,malmiron/incubator-airflow,Acehaidrey/incubator-airflow,Fokko/incubator-airflow,mtagle/airflow,danielvdende/incubator-airflow,wileeam/airflow,mtagle/airflow,lyft/incubator-airflow,subodhchhabra/airflow,wooga/airflow,adamhaney/airflow,cfei18/incubator-airflow,malmiron/incubator-airflow,owlabs/incubator-airflow,Fokko/incubator-airflow,adamhaney/airflow,artwr/airflow,malmiron/incubator-airflow,apache/airflow,lyft/incubator-airflow,spektom/incubator-airflow,owlabs/incubator-airflow,apache/incubator-airflow,DinoCow/airflow,airbnb/airflow,apache/airflow,nathanielvarona/airflow,subodhchhabra/airflow,gtoonstra/airflow,sekikn/incubator-airflow,mistercrunch/airflow,wileeam/airflow,fenglu-g/incubator-airflow,mrkm4ntr/incubator-airflow,criccomini/airflow,subodhchhabra/airflow,apache/airflow,danielvdende/incubator-airflow,dhuang/incubator-airflow,bolkedebruin/airflow,danielvdende/incubator-airflow,wileeam/airflow,cfei18/incubator-airflow,sergiohgz/incubator-airflow,sekikn/incubator-airflow,mtagle/airflow,Acehaidrey/incubator-airflow,bolkedebruin/airflow,adamhaney/airflow,edgarRd/incubator-airflow,cfei18/incubator-airflow,dhuang/incubator-airflow,artwr/airflow,Fokko/incubator-airflow,edgarRd/incubator-airflow,wooga/airflow,sergiohgz/incubator-airflow,Acehaidrey/incubator-airflow,r39132/airflow,lxneng/incubator-airflow,sekikn/incubator-airflow,r39132/airflow,edgarRd/incubator-airflow,gtoonstra/airflow,airbnb/airflow,sid88in/incubator-airflow,apache/airflow,cfei18/incubator-airflow,andyxhadji/incubator-airflow,mrkm4ntr/incubator-airflow,DinoCow/airflow,gtoonstra/airflow,Acehaidrey/incubator-airflow,akosel/incubator-airflow,gtoonstra/airflow,cfei18/incubator-airflow,fenglu-g/incubator-airflow,edgarRd/incubator-airflow,jgao54/airflow,owlabs/incubator-airflow,spektom/incubator-airflow,sergiohgz/incubator-airflow,artwr/airflow,apache/incubator-airflow,danielvdende/incubator-airflow,wileeam/airflow,akosel/incubator-airflow,spektom/incubator-airflow,airbnb/airflow,nathanielvarona/airflow,r39132/airflow,andyxhadji/incubator-airflow,bolkedebruin/airflow,fenglu-g/incubator-airflow,criccomini/airflow,CloverHealth/airflow,CloverHealth/airflow,artwr/airflow,apache/incubator-airflow,lyft/incubator-airflow,jgao54/airflow,akosel/incubator-airflow,mistercrunch/airflow,r39132/airflow,danielvdende/incubator-airflow,danielvdende/incubator-airflow,Fokko/incubator-airflow,spektom/incubator-airflow,DinoCow/airflow,apache/airflow,bolkedebruin/airflow,andyxhadji/incubator-airflow,nathanielvarona/airflow,subodhchhabra/airflow,CloverHealth/airflow,malmiron/incubator-airflow,nathanielvarona/airflow,lxneng/incubator-airflow,apache/incubator-airflow,mtagle/airflow,sid88in/incubator-airflow,mrkm4ntr/incubator-airflow,nathanielvarona/airflow,lxneng/incubator-airflow,sid88in/incubator-airflow,sid88in/incubator-airflow,adamhaney/airflow,airbnb/airflow,lxneng/incubator-airflow,DinoCow/airflow,mrkm4ntr/incubator-airflow,Acehaidrey/incubator-airflow,lyft/incubator-airflow,dhuang/incubator-airflow,Acehaidrey/incubator-airflow,owlabs/incubator-airflow,cfei18/incubator-airflow,wooga/airflow,sekikn/incubator-airflow,andyxhadji/incubator-airflow,bolkedebruin/airflow,criccomini/airflow,mistercrunch/airflow,fenglu-g/incubator-airflow,CloverHealth/airflow,jgao54/airflow,criccomini/airflow,akosel/incubator-airflow,apache/airflow