Polish Session.load Tests (#5378)

Cleaned up some confusing wording and a confusing test. Added two more
tests for demonstrating how session.load works with associations.

Issue: BAEL-2126

hibernate5/src/main/java/com/baeldung/hibernate/proxy/Company.java

@@ -2,7 +2,9 @@ package com.baeldung.hibernate.proxy;
 
 import javax.persistence.*;
 import java.io.Serializable;
+import java.util.HashSet;
 import java.util.Objects;
+import java.util.Set;
 
 @Entity
 public class Company implements Serializable {
@@ -14,6 +16,10 @@ public class Company implements Serializable {
     @Column(name = "name")
     private String name;
 
+    @OneToMany
+    @JoinColumn(name = "workplace_id")
+    private Set<Employee> employees = new HashSet<>();
+
     public Company() { }
 
     public Company(String name) {
@@ -36,6 +42,10 @@ public class Company implements Serializable {
         this.name = name;
     }
 
+    public Set<Employee> getEmployees() {
+        return this.employees;
+    }
+
     @Override
     public boolean equals(Object o) {
         if (this == o) return true;

hibernate5/src/main/java/com/baeldung/hibernate/proxy/Employee.java

@@ -15,6 +15,7 @@ public class Employee implements Serializable {
     private Long id;
 
     @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "workplace_id")
     private Company workplace;
 
     @Column(name = "first_name")