Upgrade to Tomcat 8.0.37

Closes gh-6930

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jdbc/TomcatDataSourceConfigurationTests.java

@@ -123,7 +123,7 @@ public class TomcatDataSourceConfigurationTests {
 		assertEquals(5000, ds.getTimeBetweenEvictionRunsMillis());
 		assertEquals(60000, ds.getMinEvictableIdleTimeMillis());
 		assertEquals(30000, ds.getMaxWait());
-		assertEquals(30000L, ds.getValidationInterval());
+		assertEquals(3000L, ds.getValidationInterval());
 	}
 
 	@SuppressWarnings("unchecked")

spring-boot-dependencies/pom.xml

@@ -156,7 +156,7 @@
 		<thymeleaf-extras-conditionalcomments.version>2.1.2.RELEASE</thymeleaf-extras-conditionalcomments.version>
 		<thymeleaf-layout-dialect.version>1.3.3</thymeleaf-layout-dialect.version>
 		<thymeleaf-extras-data-attribute.version>1.3</thymeleaf-extras-data-attribute.version>
-		<tomcat.version>8.0.36</tomcat.version>
+		<tomcat.version>8.0.37</tomcat.version>
 		<undertow.version>1.3.23.Final</undertow.version>
 		<velocity.version>1.7</velocity.version>
 		<velocity-tools.version>2.0</velocity-tools.version>