Additional fixes lint inspections

[Thorsten1976]

lint: java language level migration aids: for loop replaceable with foreach inspection lint: java language level migration aids: unused import inspection lint: numeric issues: pointless numeric expression inspection lint: java language level migration aids: unnecessary boxing inspection lint: java language level migration aids: unnecessary unboxing inspection lint: data flow issues: redundant local variable inspection lint: data flow issues: boolean method is always inverted inspection lint: code style issues: unnecessary semicolon inspection