Revert "Use correct walkStartTime in GetStreamingLogs"
Revert "Use correct walkStartTime in GetStreamingLogs"

This reverts commit 749e58583c676e03f3ea84c61c8540ca4dbe7f91.

[#172322729](https://www.pivotaltracker.com/story/show/172322729)

cloudfoundry/cli,cloudfoundry/cli,cloudfoundry/cli