e2e: one seleniuum session at a time
e2e: one seleniuum session at a time

We are less likely to get whacky timeouts from protractor/Sauce
interaction if we run only one selenium session at a time.

laurelnaiad/marklogic-samplestack,marklogic/marklogic-samplestack,laurelnaiad/marklogic-samplestack,omkarudipi/marklogic-samplestack,laurelnaiad/marklogic-samplestack,dmcassel/marklogic-samplestack,dmcassel/marklogic-samplestack,laurelnaiad/marklogic-samplestack,supriyantomaftuh/marklogic-samplestack,dmcassel/marklogic-samplestack,marklogic/marklogic-samplestack,omkarudipi/marklogic-samplestack,omkarudipi/marklogic-samplestack,supriyantomaftuh/marklogic-samplestack,marklogic/marklogic-samplestack,supriyantomaftuh/marklogic-samplestack,supriyantomaftuh/marklogic-samplestack,ryanjdew/discovery-app-w-samplestack,dmcassel/marklogic-samplestack,marklogic/marklogic-samplestack,omkarudipi/marklogic-samplestack,ryanjdew/discovery-app-w-samplestack,ryanjdew/discovery-app-w-samplestack,ryanjdew/discovery-app-w-samplestack