[Java] Provide recommendations after test

[kolesroma]

Provide a quick solution. We have to give user a piece of advice which trainings he should take part in.
Create the new entity recommendation which connects category and less_percentage_value

[kolesroma]

lower level; upper level -> provide recommendation

[kolesroma]

for sadness:
floor=40
ceil=90
for sadness:
floor=90
ceil=100
(could cross)

for happiness:
floor=0
ceil=40