Only run integration tests on Bash 4.1 or later
Only run integration tests on Bash 4.1 or later

Fixes #2200

Signed-off-by: Dave Tucker <f7e663289261bf5663f14748dd0817050df83f40@docker.com>

SvenDowideit/machine,rillig/docker.github.io,cvstebut/machine,sebadiaz/machine,soleo/machine,ppadala/machine,anweiss/docker.github.io,LuisBosquez/docker.github.io,skatsuta/machine,anweiss/docker.github.io,wzymaster/machine,errordeveloper/machine,thaJeztah/machine,jmelis/machine,dweomer/docker-machine,londoncalling/docker.github.io,londoncalling/docker.github.io,robertbreker/machine,StackPointCloud/machine,JohnKDay/machine,cvstebut/machine,docker/docker.github.io,zchee/machine,phiroict/docker,faijaz/docker-machine,sanscontext/docker.github.io,joeuo/docker.github.io,anweiss/docker.github.io,kunalkushwaha/machine,johnstep/docker.github.io,shin-/docker.github.io,johnstep/docker.github.io,joeuo/docker.github.io,askb/machine,ppadala/machine,menglingwei/denverdino.github.io,docker/docker.github.io,troy0820/docker.github.io,jeanlaurent/machine,robertbreker/machine,jzwlqx/denverdino.github.io,exoscale/docker-machine,zchee/machine,jgsqware/machine,shin-/docker.github.io,skatsuta/machine,soleo/machine,juliengarcia/machine,kacole2/machine,ibuildthecloud/machine,otherjason/machine,danix800/docker.github.io,trecloux/machine,shin-/docker.github.io,joaofnfernandes/docker.github.io,menglingwei/machine,denverdino/machine,BSWANG/denverdino.github.io,aduermael/docker.github.io,rillig/docker.github.io,tyrken/machine,anweiss/docker.github.io,joaofnfernandes/docker.github.io,miqui/machine,ksasi/machine,JimGalasyn/docker.github.io,kacole2/machine,exoscale/docker-machine,shin-/docker.github.io,flavio/machine,ppadala/machine,denverdino/denverdino.github.io,moxiegirl/machine,thaJeztah/docker.github.io,xiaohui/machine,JimGalasyn/docker.github.io,menglingwei/denverdino.github.io,sanscontext/docker.github.io,LuisBosquez/docker.github.io,sanscontext/docker.github.io,xiaohui/machine,JimGalasyn/docker.github.io,denverdino/machine,bdwill/docker.github.io,jzwlqx/denverdino.github.io,docker-zh/docker.github.io,phiroict/docker,errordeveloper/machine,tpires/machine,JimGalasyn/docker.github.io,denverdino/docker.github.io,docker/docker.github.io,faijaz/docker-machine,wzymaster/machine,ibuildthecloud/machine,joaofnfernandes/docker.github.io,denverdino/docker.github.io,JimGalasyn/docker.github.io,ksasi/machine,denverdino/machine,sebadiaz/machine,sanscontext/docker.github.io,thaJeztah/machine,phiroict/docker,alexisbellido/docker.github.io,shubheksha/docker.github.io,dgageot/machine,rowancarr/machine,alexisbellido/docker.github.io,thaJeztah/docker.github.io,johnstep/docker.github.io,shin-/docker.github.io,joeuo/docker.github.io,alexisbellido/docker.github.io,menglingwei/machine,londoncalling/machine,pottava/machine,gdevillele/docker.github.io,dweomer/docker-machine,jgsqware/machine,aduermael/docker.github.io,menglingwei/machine,bgokden/machine,jzwlqx/denverdino.github.io,joeuo/docker.github.io,docker-zh/docker.github.io,LuisBosquez/docker.github.io,phiroict/docker,Herbis/machine,ksasi/machine,tpires/machine,gdevillele/docker.github.io,kunalkushwaha/machine,denverdino/denverdino.github.io,jmelis/machine,sebadiaz/machine,flavio/machine,rowancarr/machine,voutilad/machine,johnstep/docker.github.io,miqui/machine,joaofnfernandes/docker.github.io,gdevillele/docker.github.io,joaofnfernandes/docker.github.io,ubiquityhosting/machine,trecloux/machine,soleo/machine,usmanismail/machine,aduermael/docker.github.io,robertbreker/machine,docker/docker.github.io,menglingwei/denverdino.github.io,rillig/docker.github.io,denverdino/denverdino.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io,troy0820/docker.github.io,xinxian0458/machine,SvenDowideit/machine,aduermael/docker.github.io,docker-zh/docker.github.io,tpires/machine,juliengarcia/machine,bdwill/docker.github.io,usmanismail/machine,BSWANG/denverdino.github.io,larsla/machine,zchee/machine,bgokden/machine,joeuo/docker.github.io,thaJeztah/machine,johnstep/docker.github.io,denverdino/docker.github.io,londoncalling/docker.github.io,rillig/docker.github.io,jeffellin/machine,denverdino/docker.github.io,bdwill/docker.github.io,LuisBosquez/docker.github.io,tyrken/machine,otherjason/machine,londoncalling/docker.github.io,docker/machine,londoncalling/docker.github.io,jsirois/machine,errordeveloper/machine,jsirois/machine,trecloux/machine,jgsqware/machine,jsirois/machine,jeanlaurent/machine,gdevillele/docker.github.io,sanscontext/docker.github.io,pottava/machine,Herbis/machine,cvstebut/machine,robvanmieghem/machine,alexisbellido/docker.github.io,robvanmieghem/machine,menglingwei/denverdino.github.io,bdwill/docker.github.io,docker-zh/docker.github.io,voutilad/machine,denverdino/denverdino.github.io,otherjason/machine,BSWANG/denverdino.github.io,robvanmieghem/machine,bgokden/machine,juliengarcia/machine,londoncalling/machine,xiaohui/machine,jeanlaurent/machine,askb/machine,denverdino/denverdino.github.io,docker/machine,shubheksha/docker.github.io,denverdino/docker.github.io,BSWANG/denverdino.github.io,JohnKDay/machine,jeffellin/machine,danix800/docker.github.io,xinxian0458/machine,jmelis/machine,StackPointCloud/machine,troy0820/docker.github.io,thaJeztah/docker.github.io,dgageot/machine,askb/machine,pottava/machine,moxiegirl/machine,larsla/machine,jzwlqx/denverdino.github.io,rowancarr/machine,usmanismail/machine,xinxian0458/machine,jzwlqx/denverdino.github.io,JohnKDay/machine,kunalkushwaha/machine,bdwill/docker.github.io,shubheksha/docker.github.io,moxiegirl/machine,docker-zh/docker.github.io,gdevillele/docker.github.io,tyrken/machine,faijaz/docker-machine,miqui/machine,menglingwei/denverdino.github.io,phiroict/docker,skatsuta/machine,kacole2/machine,danix800/docker.github.io,ubiquityhosting/machine,anweiss/docker.github.io,BSWANG/denverdino.github.io,troy0820/docker.github.io,wzymaster/machine,ubiquityhosting/machine,LuisBosquez/docker.github.io,danix800/docker.github.io,docker/docker.github.io,shubheksha/docker.github.io,jeffellin/machine,shubheksha/docker.github.io,alexisbellido/docker.github.io,StackPointCloud/machine