Avoid unsupported sleep parameter

Signed-off-by: Tudor Florea <tudor.florea@enea.com>
Upstream-Status: Pending

diff -ruN a/simple b/simple
--- a/tests/ts/tailf/simple	2015-11-12 11:34:49.971817130 +0200
+++ b/tests/ts/tailf/simple	2013-11-12 11:34:37.876325128 +0200
@@ -27,9 +27,9 @@
 
 $TS_CMD_TAILF $INPUT > $TS_OUTPUT 2>&1 &
 
-sleep 0.5
+sleep 1
 echo {0..9} >> $INPUT
-sleep 0.5
+sleep 1
 
 rm -f $INPUT