fixes

src/main/java/com/kalyshev/yan/cabinet/model/Cabinet.java

@@ -55,7 +55,7 @@ public class Cabinet {
         if (!(o instanceof Cabinet))
             return false;
         Cabinet cabinet = (Cabinet) o;
-        return Objects.equals(id, cabinet.id) && Objects.equals(this.number, cabinet.number);
+        return Objects.equals(id, cabinet.id);
     }
     @Override
     public int hashCode() {

src/main/java/com/kalyshev/yan/computer/model/Computer.java

@@ -64,7 +64,7 @@ public class Computer {
         if (!(o instanceof Computer))
             return false;
         Computer computer = (Computer) o;
-        return Objects.equals(id, computer.id) && Objects.equals(this.modelName, computer.modelName) && Objects.equals(this.monitor, computer.monitor) && Objects.equals(this.cabinet, computer.cabinet);
+        return Objects.equals(id, computer.id);
     }
     @Override
     public int hashCode() {

src/main/java/com/kalyshev/yan/monitor/model/Monitor.java

@@ -35,7 +35,7 @@ public class Monitor {
         if (!(o instanceof Monitor))
             return false;
         Monitor monitor = (Monitor) o;
-        return Objects.equals(id, monitor.id) && Objects.equals(this.modelName, monitor.modelName);
+        return Objects.equals(id, monitor.id);
     }
     @Override
     public int hashCode() {