Merged test cases into solution
Merge remote-tracking branch 'origin/solution'

Conflicts:
	src/main/java/fr/xebia/xke/cassandra/CassandraExecutor.java
update: CQL scripts
rm: useless test and intellij project file
clean
rm: *.iml and add it to gitignore
fix: column name of USER table
update: unit test and documentation on repository methods
update: README
fix: NPE on unit test without implementation of repository methods
remove: solution