AirportsByLatitudeSolution.java: variable name typo

[li-boxuan]

sparkTutorial/src/main/java/com/sparkTutorial/rdd/airports/AirportsByLatitudeSolution.java

Line 19 in e6b73d4

JavaRDD<String> airportsInUSA = airports.filter(line -> Float.valueOf(line.split(Utils.COMMA_DELIMITER)[6]) > 40);

This returns airports with latitude > 40, not airports in USA. The variable name airportsInUSA looks like a typo.