Update tomcat:7.0.90

Fixes gh-5824

gradle/tomcat.gradle

@@ -10,7 +10,7 @@ buildscript {
 apply plugin: 'com.bmuschko.tomcat'
 
 dependencies {
-	def tomcatVersion = '7.0.54'
+	def tomcatVersion = '7.0.90'
 	tomcat "org.apache.tomcat.embed:tomcat-embed-core:${tomcatVersion}",
 			"org.apache.tomcat.embed:tomcat-embed-logging-juli:${tomcatVersion}",
 			"org.apache.tomcat.embed:tomcat-embed-websocket:${tomcatVersion}",
@@ -62,4 +62,4 @@ def reservePorts(int count) {
 	def result = sockets*.localPort
 	sockets*.close()
 	result
-}
+}