Add a missing space in external_integration_test
Add a missing space in external_integration_test

Without that spaces, we were getting:
src/test/shell/bazel/external_integration_test: line 540: [: missing `]'
in the test log.

--
MOS_MIGRATED_REVID=117707546

mbrukman/bazel,dslomov/bazel,mikelalcon/bazel,abergmeier-dsfishlabs/bazel,Asana/bazel,LuminateWireless/bazel,kchodorow/bazel-1,twitter-forks/bazel,safarmer/bazel,damienmg/bazel,werkt/bazel,perezd/bazel,akira-baruah/bazel,kchodorow/bazel,mikelikespie/bazel,dslomov/bazel-windows,Asana/bazel,damienmg/bazel,meteorcloudy/bazel,twitter-forks/bazel,spxtr/bazel,whuwxl/bazel,katre/bazel,zhexuany/bazel,iamthearm/bazel,katre/bazel,dropbox/bazel,dslomov/bazel,whuwxl/bazel,bazelbuild/bazel,spxtr/bazel,ButterflyNetwork/bazel,aehlig/bazel,Asana/bazel,Asana/bazel,juhalindfors/bazel-patches,bazelbuild/bazel,ulfjack/bazel,juhalindfors/bazel-patches,hermione521/bazel,iamthearm/bazel,zhexuany/bazel,mikelalcon/bazel,dropbox/bazel,werkt/bazel,LuminateWireless/bazel,akira-baruah/bazel,Asana/bazel,mrdomino/bazel,dslomov/bazel-windows,variac/bazel,damienmg/bazel,snnn/bazel,meteorcloudy/bazel,LuminateWireless/bazel,mbrukman/bazel,meteorcloudy/bazel,ulfjack/bazel,kchodorow/bazel,davidzchen/bazel,meteorcloudy/bazel,kchodorow/bazel-1,aehlig/bazel,UrbanCompass/bazel,akira-baruah/bazel,mrdomino/bazel,anupcshan/bazel,kchodorow/bazel,hermione521/bazel,whuwxl/bazel,meteorcloudy/bazel,davidzchen/bazel,dslomov/bazel,variac/bazel,bazelbuild/bazel,ulfjack/bazel,kchodorow/bazel,damienmg/bazel,Asana/bazel,LuminateWireless/bazel,UrbanCompass/bazel,Asana/bazel,variac/bazel,twitter-forks/bazel,UrbanCompass/bazel,mrdomino/bazel,spxtr/bazel,ulfjack/bazel,variac/bazel,mikelikespie/bazel,kchodorow/bazel-1,kchodorow/bazel-1,dropbox/bazel,perezd/bazel,mbrukman/bazel,abergmeier-dsfishlabs/bazel,ButterflyNetwork/bazel,dslomov/bazel-windows,dslomov/bazel,ulfjack/bazel,mikelalcon/bazel,akira-baruah/bazel,twitter-forks/bazel,dslomov/bazel,safarmer/bazel,abergmeier-dsfishlabs/bazel,meteorcloudy/bazel,aehlig/bazel,davidzchen/bazel,whuwxl/bazel,zhexuany/bazel,variac/bazel,ButterflyNetwork/bazel,mbrukman/bazel,variac/bazel,spxtr/bazel,safarmer/bazel,dropbox/bazel,LuminateWireless/bazel,snnn/bazel,mrdomino/bazel,twitter-forks/bazel,snnn/bazel,mbrukman/bazel,davidzchen/bazel,snnn/bazel,ButterflyNetwork/bazel,hermione521/bazel,safarmer/bazel,snnn/bazel,hermione521/bazel,zhexuany/bazel,bazelbuild/bazel,ulfjack/bazel,perezd/bazel,iamthearm/bazel,kchodorow/bazel,dslomov/bazel,snnn/bazel,meteorcloudy/bazel,aehlig/bazel,iamthearm/bazel,dslomov/bazel-windows,dslomov/bazel,LuminateWireless/bazel,werkt/bazel,aehlig/bazel,mikelikespie/bazel,ButterflyNetwork/bazel,damienmg/bazel,aehlig/bazel,dslomov/bazel-windows,akira-baruah/bazel,abergmeier-dsfishlabs/bazel,perezd/bazel,perezd/bazel,hermione521/bazel,mrdomino/bazel,mikelalcon/bazel,dslomov/bazel-windows,UrbanCompass/bazel,anupcshan/bazel,safarmer/bazel,anupcshan/bazel,cushon/bazel,damienmg/bazel,katre/bazel,juhalindfors/bazel-patches,mikelalcon/bazel,werkt/bazel,aehlig/bazel,iamthearm/bazel,juhalindfors/bazel-patches,anupcshan/bazel,cushon/bazel,juhalindfors/bazel-patches,spxtr/bazel,katre/bazel,iamthearm/bazel,UrbanCompass/bazel,hermione521/bazel,safarmer/bazel,damienmg/bazel,juhalindfors/bazel-patches,davidzchen/bazel,mbrukman/bazel,mikelikespie/bazel,snnn/bazel,twitter-forks/bazel,ButterflyNetwork/bazel,UrbanCompass/bazel,kchodorow/bazel-1,werkt/bazel,perezd/bazel,kchodorow/bazel-1,abergmeier-dsfishlabs/bazel,kchodorow/bazel,katre/bazel,mikelikespie/bazel,ulfjack/bazel,whuwxl/bazel,cushon/bazel,cushon/bazel,zhexuany/bazel,mikelikespie/bazel,akira-baruah/bazel,davidzchen/bazel,whuwxl/bazel,zhexuany/bazel,bazelbuild/bazel,spxtr/bazel,mrdomino/bazel,dropbox/bazel,davidzchen/bazel,dropbox/bazel,mikelalcon/bazel,juhalindfors/bazel-patches,anupcshan/bazel,spxtr/bazel,variac/bazel,perezd/bazel,kchodorow/bazel,cushon/bazel,katre/bazel,anupcshan/bazel,werkt/bazel,cushon/bazel,abergmeier-dsfishlabs/bazel,bazelbuild/bazel,twitter-forks/bazel