Upgrade to Tomcat 7.0.70

Related to #9891

Author: jeffscottbrown

grails-plugin-datasource/build.gradle

@@ -1,4 +1,4 @@
-def tomcatVersion = '7.0.69'
+def tomcatVersion = '7.0.70'
 dependencies {
     compile("org.springframework:spring-jdbc:${springVersion}") {
         exclude group: 'commons-logging', module:'commons-logging'

grails-resources/src/grails/grails-app/conf/BuildConfig.groovy

@@ -55,7 +55,7 @@ grails.project.dependency.resolution = {
 
     plugins {
         // plugins for the build system only
-        build ":tomcat:7.0.69-SNAPSHOT" // or ":tomcat:8.0.22"
+        build ":tomcat:7.0.70" // or ":tomcat:8.0.22"
 
         // plugins for the compile step
         compile ":scaffolding:2.1.2"