Upgrade to Mockito 2.7.22

Closes gh-8993

spring-boot-dependencies/pom.xml

@@ -130,7 +130,7 @@
 		<lombok.version>1.16.16</lombok.version>
 		<mariadb.version>1.5.9</mariadb.version>
 		<mssql-jdbc.version>6.1.0.jre8</mssql-jdbc.version>
-		<mockito.version>2.5.4</mockito.version>
+		<mockito.version>2.7.22</mockito.version>
 		<mongo-driver-reactivestreams.version>1.3.0</mongo-driver-reactivestreams.version>
 		<mongodb.version>3.4.2</mongodb.version>
 		<mysql.version>5.1.41</mysql.version>