enable coveralls

Also, get rid of underscore entity (Person_.java) per
http://stackoverflow.com/questions/23326456/why-is-there-a-class-with-entity-name-plus-an-underscore-for-jpa-entity-class

.travis.yml

@@ -1,2 +1,3 @@
 language: java
 script: cd examples/javaee7 && mvn test
+after_success: cd examples/javaee7 && mvn jacoco:report coveralls:report

examples/javaee7/pom.xml

@@ -140,8 +140,19 @@
                             <goal>report</goal>
                         </goals>
                     </execution>
+                    <execution>
+                        <id>prepare-agent</id>
+                        <goals>
+                            <goal>prepare-agent</goal>
+                        </goals>
+                    </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.eluder.coveralls</groupId>
+                <artifactId>coveralls-maven-plugin</artifactId>
+                <version>4.0.0</version>
+            </plugin>
         </plugins>
     </build>
 

examples/javaee7/src/main/resources/META-INF/persistence.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
     <persistence-unit name="javaee7addressbookPersistenceUnit" transaction-type="JTA">
-        <exclude-unlisted-classes>false</exclude-unlisted-classes>
+        <exclude-unlisted-classes>true</exclude-unlisted-classes>
         <properties>
             <property name="javax.persistence.schema-generation.database.action" value="create"/>
         </properties>