reduce function implement now
Merge branch 'master' of github.com:moguonyanko/moglabo
Merge branch 'master' of https://github.com/moguonyanko/moglabo

Conflicts:
	lang/java/exercise/src/exercise/lang/LambdaPractice.java
	lang/java/exercise/test/test/exercise/lang/TestLambdaPractice.java

Signed-off-by: KouichiYamada <k-yamada@tg-inet.co.jp>