ipptool: DELAY directive should be applied to each retry about ippsample HOT 2 CLOSED

OK, so the existing code uses a semi-random delay between repeats (a fibonacci sequence: 1 1 2 3 5 8). What I've done is change this to use a default repeat interval (delay) of 5 seconds, which is overridden by the DELAY directive. The DELAY directive now also allows you to specify two numbers to control the initial delay and the repeat interval separately, e.g.:

DELAY 30,10

specifies an initial delay of 30 seconds and 10 seconds between repeated tests.

[master f292e13] Update DELAY directive to control repeat interval (Issue #38)

from ippsample.

(this will get mirrored to the ippeveselfcert repository as soon as I finish up the CUPS 2.2.4 changes, which will get mirrored to ippsample and ippeveselfcert...)

from ippsample.