Feature add: Add random function in case-lib/lib.sh #25
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Add func_lib_get_random go get random value
$# == 2: $1 is max, $2 is min
so the random value will in [ min - max ]
$# == 1: $1 is max
so the random value will in [ 0 - max ]
Other:
get $RANDOM which define by bash, this value will in [ 0 - 32767 ]
Signed-off-by: Wu, BinX binx.wu@intel.com