Remove the data type from the parameter list in the lambda.

The data type of the parameters in a lambda expression can be ommited.
In addition, the parentheses can be ommited if there is only one
parameter

Change-Id: Ia867963e1d571e79e9098240e1ba1be32bc5ef63
Implement Stopwatch class for measuring and logging execution time

Change-Id: I39e763b3112037f9537d53b612a10adbf7bcf485
Impropve the MyFirstLambda class.

Microbenchmark the (parallel) stream

Change-Id: I9f0351fc37a1e7e31d591be2f303831f0b8c8968