Fixed CPU soft limit check (#885)

Author: ktmitton

install.sh

@@ -138,7 +138,7 @@ fi
 if [[ "$CPU_AVAILABLE_IN_DOCKER" -lt "$MIN_CPU_HARD" ]]; then
   echo "FAIL: Required minimum CPU cores available to Docker is $MIN_CPU_HARD, found $CPU_AVAILABLE_IN_DOCKER"
   exit 1
-elif [[ "$RAM_AVAILABLE_IN_DOCKER" -lt "$MIN_CPU_SOFT" ]]; then
+elif [[ "$CPU_AVAILABLE_IN_DOCKER" -lt "$MIN_CPU_SOFT" ]]; then
   echo "WARN: Recommended minimum CPU cores available to Docker is $MIN_CPU_SOFT, found $CPU_AVAILABLE_IN_DOCKER"
 fi