add first integration test

pom.xml

@@ -1,4 +1,5 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>com.commafeed</groupId>
@@ -47,6 +48,19 @@
 				<artifactId>maven-surefire-plugin</artifactId>
 				<version>2.22.2</version>
 			</plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-failsafe-plugin</artifactId>
+				<version>2.22.2</version>
+				<executions>
+					<execution>
+						<goals>
+							<goal>integration-test</goal>
+							<goal>verify</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
 			<plugin>
 				<groupId>pl.project13.maven</groupId>
 				<artifactId>git-commit-id-plugin</artifactId>
@@ -525,5 +539,15 @@
 			<version>5.13.2</version>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>io.dropwizard</groupId>
+			<artifactId>dropwizard-testing</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.awaitility</groupId>
+			<artifactId>awaitility</artifactId>
+			<scope>test</scope>
+		</dependency>
 	</dependencies>
 </project>