HPCC-8671 Variable name misspelling causes error in eclwatch

Corrected misspelled variable name "countRoxieClusters"
(was counRoxieClusters)

Signed-off-by: William Whitehead <william.whitehead@lexisnexis.com>
Merge pull request #3898 from RussWhitehead/espVar

HPCC-8671 Variable name misspelling causes error in eclwatch

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>