Force CLI mode on execute, not suite setup.
Force CLI mode on execute, not suite setup.

We had a bunch of tests that were using the suite to execute,
but not for mocking, so it didn't go through the suite/test setup
logic that forced the cli mode. Moved the mode change to the execute
method so it's always on.

harshiam-hdinsight/azure-xplat-cli,oaastest/azure-xplat-cli,StephanieMak/azure-xplat-cli,huangpf/azure-xplat-cli,mkliu/azure-xplat-cli,harshiam-hdinsight/azure-xplat-cli,namratab/azure-xplat-cli,msfcolombo/azure-xplat-cli,sequenceiq/azure-xplat-cli,xingwu1/azure-xplat-cli,ruslangabitov/azure-xplat-cli,rkmanda/azure-xplat-cli,freedev/azure-xplat-cli,kleptog/azure-xplat-cli,v-sreban/azure-sdk-tools-xplat,colrack/azure-xplat-cli,jimdial/azure-xplat-cli,NaveenGoli/azure-xplat-cli,shuagarw/azure-xplat-cli,huangpf/azure-xplat-cli,amarzavery/azure-xplat-cli,MikhailTryakhov/azure-xplat-cli,yugangw-msft/azure-sdk-tools-xplat,rohmano/azure-xplat-cli,xingwu1/azure-xplat-cli,kleptog/azure-xplat-cli,guerrerocarlos/azure-xplat-cli,jimdial/azure-xplat-cli,Azure/azure-xplat-cli,colrack/azure-xplat-cli,yuezh/azure-xplat-cli,yuezh/azure-xplat-cli,DeepakRajendranMsft/azure-xplat-cli,alexlau811/azure-xplat-cli,haocs/azure-xplat-cli,rohmano/azure-xplat-cli,yuezh/azure-xplat-cli,StephanieMak/azure-xplat-cli,madhana/azure-xplat-cli,shuagarw/azure-xplat-cli,sequenceiq/azure-xplat-cli,nbikhchandani/azure-xplat-cli,madhana/azure-xplat-cli,alexlau811/azure-xplat-cli,GuoyuHao/azure-xplat-cli,msfcolombo/azure-xplat-cli,freedev/azure-xplat-cli,jasper-schneider/azure-xplat-cli,huangpf/azure-xplat-cli,jmspring/azure-xplat-cli,namratab/azure-xplat-cli,MsysTechnologiesllc/azure-xplat-cli,rkmanda/azure-xplat-cli,yugangw-msft/azure-xplat-cli,guerrerocarlos/azure-xplat-cli,sequenceiq/azure-xplat-cli,markcowl/azure-xplat-cli,wastoresh/azure-xplat-cli,jimdial/azure-xplat-cli,harshiam-hdinsight/azure-xplat-cli,rkmanda/azure-xplat-cli,amarzavery/azure-xplat-cli,colrack/azure-xplat-cli,oaastest/azure-xplat-cli,shuagarw/azure-xplat-cli,xiaomi7732/azure-xplat-cli,vivsriaus/azure-xplat-cli,yugangw-msft/azure-xplat-cli,rohmano/azure-xplat-cli,jmspring/azure-xplat-cli,GuoyuHao/azure-xplat-cli,yugangw-msft/azure-xplat-cli,Azure/azure-xplat-cli,AzureRT/azure-xplat-cli,guerrerocarlos/azure-xplat-cli,oaastest/azure-xplat-cli,madhana/azure-xplat-cli,mkliu/azure-xplat-cli,GuoyuHao/azure-xplat-cli,jasper-schneider/azure-xplat-cli,msfcolombo/azure-xplat-cli,xiaomi7732/azure-xplat-cli,amarzavery/azure-xplat-cli,iairnino/azure-xplat-cli,ClogenyTechnologies/azure-xplat-cli,haocs/azure-xplat-cli,MikhailTryakhov/azure-xplat-cli,yugangw-msft/azure-xplat-cli,MsysTechnologiesllc/azure-xplat-cli,kleptog/azure-xplat-cli,vivsriaus/azure-xplat-cli,nbikhchandani/azure-xplat-cli,wastoresh/azure-xplat-cli,mkliu/azure-xplat-cli,ClogenyTechnologies/azure-xplat-cli,yugangw-msft/azure-xplat-cli,yugangw-msft/azure-sdk-tools-xplat,vivsriaus/azure-xplat-cli,Azure/azure-xplat-cli,nandhanurrevanth/azure-sdk-tools-xplat,AzureRT/azure-xplat-cli,Nepomuceno/azure-xplat-cli,ClogenyTechnologies/azure-xplat-cli,freedev/azure-xplat-cli,MikhailTryakhov/azure-xplat-cli,mamaso/azure-xplat-cli,alexlau811/azure-xplat-cli,mamaso/azure-xplat-cli,MsysTechnologiesllc/azure-xplat-cli,haocs/azure-xplat-cli,namratab/azure-xplat-cli,StephanieMak/azure-xplat-cli,Azure/azure-xplat-cli,Nepomuceno/azure-xplat-cli,Nepomuceno/azure-xplat-cli,nbikhchandani/azure-xplat-cli,yugangw-msft/azure-sdk-tools-xplat,Azure/azure-xplat-cli,wastoresh/azure-xplat-cli,jmspring/azure-xplat-cli,colrack/azure-xplat-cli,xingwu1/azure-xplat-cli,jasper-schneider/azure-xplat-cli,harshiam-hdinsight/azure-xplat-cli,AzureRT/azure-xplat-cli,amarzavery/azure-xplat-cli,xiaomi7732/azure-xplat-cli,amarzavery/azure-xplat-cli