Use apache commons for Stopwatch instead of guava

[ehsanhaq]

In the later version of guava from 15 onwards the constructor method of StopWatch has been deprecated, and throws following exception.

java.lang.IllegalAccessError: tried to access method com.google.common.base.Stopwatch.()V from class magellan.mapreduce.ShapeInputFormat at magellan.mapreduce.ShapeInputFormat.computeSplits(ShapeInputFormat.scala:50) at magellan.mapreduce.ShapeInputFormat.getSplits(ShapeInputFormat.scala:43) at org.apache.spark.rdd.NewHadoopRDD.getPartitions(NewHadoopRDD.scala:125) at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:252) at org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:250) at scala.Option.getOrElse(Option.scala:121)

This make it impossible to use magellan where it is required to have a later version of guava 15+

To solve this we could either use System.getTime or apache commons-lang3 which also provides a StopWatch class. This PR uses commons-lang3 StopWatch to elevate the dependency on guava.

[codecov-io]

Codecov Report

Merging #221 into master will decrease coverage by 0.04%. The diff coverage is 60%.

@@            Coverage Diff             @@
##           master     #221      +/-   ##
==========================================
- Coverage   90.16%   90.11%   -0.05%     
==========================================
  Files          52       52              
  Lines        1789     1791       +2     
  Branches      124      125       +1     
==========================================
+ Hits         1613     1614       +1     
- Misses        176      177       +1

Impacted Files	Coverage Δ
...in/scala/magellan/mapreduce/ShapeInputFormat.scala	88.23% <60%> (-2.39%)	:arrow_down:

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[ehsanhaq]

@harsha2010 could you review this PR.