Honor DOCKER_CERT_PATH environment in nonNativeSetup
Honor DOCKER_CERT_PATH environment in nonNativeSetup

Previously only certificates relative to the home folder
were honored, which made using custom storage locations
via MACHINE_STORAGE_PATH for docker machines quite
cumbersome to use.

This helps with the issue #1640.

Signed-off-by: Thomas Darimont <eecf90509fb05d22c10e8117829fae1b439807b2@gmail.com>

denverdino/docker.github.io,docker/kitematic,menglingwei/denverdino.github.io,docker/docker.github.io,docker/docker.github.io,sanscontext/docker.github.io,rillig/docker.github.io,denverdino/docker.github.io,rlugojr/kitematic,BSWANG/denverdino.github.io,joeuo/docker.github.io,aduermael/docker.github.io,johnstep/docker.github.io,JimGalasyn/docker.github.io,phiroict/docker,shubheksha/docker.github.io,shubheksha/docker.github.io,gdevillele/docker.github.io,docker/kitematic,rillig/docker.github.io,joaofnfernandes/docker.github.io,jzwlqx/denverdino.github.io,alexisbellido/docker.github.io,kitematic/kitematic,joaofnfernandes/docker.github.io,joeuo/docker.github.io,docker-zh/docker.github.io,joeuo/docker.github.io,sanscontext/docker.github.io,johnstep/docker.github.io,BSWANG/denverdino.github.io,docker-zh/docker.github.io,docker/docker.github.io,LuisBosquez/docker.github.io,anweiss/docker.github.io,danix800/docker.github.io,daaru00/kitematic,kitematic/kitematic,anweiss/docker.github.io,londoncalling/docker.github.io,alexisbellido/docker.github.io,troy0820/docker.github.io,aduermael/docker.github.io,londoncalling/docker.github.io,daaru00/kitematic,troy0820/docker.github.io,phiroict/docker,aduermael/docker.github.io,phiroict/docker,bdwill/docker.github.io,denverdino/denverdino.github.io,jzwlqx/denverdino.github.io,shubheksha/docker.github.io,shin-/docker.github.io,bdwill/docker.github.io,anweiss/docker.github.io,troy0820/docker.github.io,docker-zh/docker.github.io,BSWANG/denverdino.github.io,daaru00/kitematic,anweiss/docker.github.io,menglingwei/denverdino.github.io,shin-/docker.github.io,shubheksha/docker.github.io,joaofnfernandes/docker.github.io,docker/docker.github.io,danix800/docker.github.io,troy0820/docker.github.io,JimGalasyn/docker.github.io,thaJeztah/docker.github.io,denverdino/docker.github.io,gdevillele/docker.github.io,menglingwei/denverdino.github.io,denverdino/docker.github.io,bdwill/docker.github.io,docker-zh/docker.github.io,JimGalasyn/docker.github.io,alexisbellido/docker.github.io,joeuo/docker.github.io,menglingwei/denverdino.github.io,rillig/docker.github.io,gdevillele/docker.github.io,sanscontext/docker.github.io,rillig/docker.github.io,shubheksha/docker.github.io,phiroict/docker,LuisBosquez/docker.github.io,sanscontext/docker.github.io,johnstep/docker.github.io,londoncalling/docker.github.io,JimGalasyn/docker.github.io,jzwlqx/denverdino.github.io,shin-/docker.github.io,docker/kitematic,shin-/docker.github.io,denverdino/denverdino.github.io,bdwill/docker.github.io,johnstep/docker.github.io,alexisbellido/docker.github.io,docker/docker.github.io,sanscontext/docker.github.io,denverdino/denverdino.github.io,thaJeztah/docker.github.io,londoncalling/docker.github.io,gdevillele/docker.github.io,jzwlqx/denverdino.github.io,danix800/docker.github.io,joaofnfernandes/docker.github.io,alexisbellido/docker.github.io,aduermael/docker.github.io,LuisBosquez/docker.github.io,joaofnfernandes/docker.github.io,thaJeztah/docker.github.io,LuisBosquez/docker.github.io,rlugojr/kitematic,BSWANG/denverdino.github.io,docker-zh/docker.github.io,johnstep/docker.github.io,docker/kitematic,phiroict/docker,denverdino/denverdino.github.io,denverdino/denverdino.github.io,danix800/docker.github.io,menglingwei/denverdino.github.io,BSWANG/denverdino.github.io,thaJeztah/docker.github.io,shin-/docker.github.io,kitematic/kitematic,joeuo/docker.github.io,thaJeztah/docker.github.io,rlugojr/kitematic,jzwlqx/denverdino.github.io,LuisBosquez/docker.github.io,anweiss/docker.github.io,gdevillele/docker.github.io,londoncalling/docker.github.io,JimGalasyn/docker.github.io,bdwill/docker.github.io,denverdino/docker.github.io