Fixing a bug that prevents resource from working with Dell EMC ECS object store

[adam-power]

Currently, this resource's check function throws an error when working with ECS. ECS is an S3-compliant object store from Dell EMC (more info here). Check throws the following error:

resource script '/opt/resource/check []' failed: exit status 1

stderr:
�[31merror finding versions: InvalidArgument: Invalid Argument
	status code: 400, request id: 0ac6640d:1635ec685dc:834e8:55, host id: 

�[0m

This is a simple fix to eliminate that error when interacting with ECS buckets.

[pivotal-issuemaster]

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[pivotal-issuemaster]

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[vito]

thanks!