Hypervisor show command has a few bugs as follows.
- It doesn't trim an extra whitespace in the head of uptime
information.
- It doesn't display uptime information when the number of user is 1.
This patch fixes the regular expression to match uptime information.
Change-Id: Ic2f7fd9a9274466717084a0886f95f78e98a9007
Closes-Bug: 1611809