added support in iperf for different result formats. also added upper bounds for hifi tests
set staticArp in testLinkDelay
fixed default iperf formatting behavior
rolled back to iperf format option, and changed 'cpu' variable to 'pct'
Revert "fixed default iperf formatting behavior"

This reverts commit 0e733c77543b16a67d77465b416fdd77cb509807.
set default iperf formatting to none
Merge pull request #318 from cdburkard/patches/hifi_fix

added support in iperf for different result formats.