Update to Tomcat 9

Spring recently updated to require Servlet 4, so update to Tomcat 9.

Closes gh-6

servlet/java-configuration/aspectj/gradle.properties

@@ -1 +0,0 @@
-tomcat85Version=8.5.54

servlet/java-configuration/aspectj/gradle/gretty.gradle

@@ -1,5 +1,5 @@
 gretty {
-	servletContainer = "tomcat85"
+	servletContainer = "tomcat9"
 	contextPath = "/"
 	fileLogEnabled = false
 	integrationTestTask = 'integrationTest'

servlet/java-configuration/authentication/preauth/gradle.properties

@@ -1 +0,0 @@
-tomcat85Version=8.5.54

servlet/java-configuration/authentication/preauth/gradle/gretty.gradle

@@ -1,5 +1,5 @@
 gretty {
-	servletContainer = "tomcat85"
+	servletContainer = "tomcat9"
 	contextPath = "/"
 	fileLogEnabled = false
 	integrationTestTask = 'integrationTest'

servlet/java-configuration/authentication/remember-me/gradle.properties

@@ -1 +0,0 @@
-tomcat85Version=8.5.54

servlet/java-configuration/authentication/remember-me/gradle/gretty.gradle

@@ -1,5 +1,5 @@
 gretty {
-	servletContainer = "tomcat85"
+	servletContainer = "tomcat9"
 	contextPath = "/"
 	fileLogEnabled = false
 	integrationTestTask = 'integrationTest'

servlet/java-configuration/authentication/username-password/form/gradle.properties

@@ -1 +0,0 @@
-tomcat85Version=8.5.54

servlet/java-configuration/authentication/username-password/form/gradle/gretty.gradle

@@ -1,5 +1,5 @@
 gretty {
-	servletContainer = "tomcat85"
+	servletContainer = "tomcat9"
 	contextPath = "/"
 	fileLogEnabled = false
 	integrationTestTask = 'integrationTest'

servlet/java-configuration/authentication/username-password/in-memory/gradle.properties

@@ -1 +0,0 @@
-tomcat85Version=8.5.54

servlet/java-configuration/authentication/username-password/in-memory/gradle/gretty.gradle

@@ -1,5 +1,5 @@
 gretty {
-	servletContainer = "tomcat85"
+	servletContainer = "tomcat9"
 	contextPath = "/"
 	fileLogEnabled = false
 	integrationTestTask = 'integrationTest'

servlet/java-configuration/authentication/username-password/jdbc/gradle.properties

@@ -1 +0,0 @@
-tomcat85Version=8.5.54

servlet/java-configuration/authentication/username-password/jdbc/gradle/gretty.gradle

@@ -1,5 +1,5 @@
 gretty {
-	servletContainer = "tomcat85"
+	servletContainer = "tomcat9"
 	contextPath = "/"
 	fileLogEnabled = false
 	integrationTestTask = 'integrationTest'

servlet/java-configuration/authentication/username-password/ldap/gradle.properties

@@ -1 +0,0 @@
-tomcat85Version=8.5.54

servlet/java-configuration/authentication/username-password/ldap/gradle/gretty.gradle

@@ -1,5 +1,5 @@
 gretty {
-	servletContainer = "tomcat85"
+	servletContainer = "tomcat9"
 	contextPath = "/"
 	fileLogEnabled = false
 	integrationTestTask = 'integrationTest'

servlet/java-configuration/authentication/x509/gradle.properties

@@ -1 +0,0 @@
-tomcat85Version=8.5.54

servlet/java-configuration/authentication/x509/gradle/gretty.gradle

@@ -1,5 +1,5 @@
 gretty {
-	servletContainer = "tomcat85"
+	servletContainer = "tomcat9"
 	contextPath = "/"
 	fileLogEnabled = false
 	integrationTestTask = 'integrationTest'

servlet/java-configuration/data/gradle.properties

@@ -1 +0,0 @@
-tomcat85Version=8.5.54

servlet/java-configuration/hello-mvc-security/gradle.properties

@@ -1 +0,0 @@
-tomcat85Version=8.5.54

servlet/java-configuration/hello-mvc-security/gradle/gretty.gradle

@@ -1,5 +1,5 @@
 gretty {
-	servletContainer = "tomcat85"
+	servletContainer = "tomcat9"
 	contextPath = "/"
 	fileLogEnabled = false
 	integrationTestTask = 'integrationTest'

servlet/java-configuration/hello-security-explicit/gradle.properties

@@ -1 +0,0 @@
-tomcat85Version=8.5.54

servlet/java-configuration/hello-security-explicit/gradle/gretty.gradle

@@ -1,5 +1,5 @@
 gretty {
-	servletContainer = "tomcat85"
+	servletContainer = "tomcat9"
 	contextPath = "/"
 	fileLogEnabled = false
 	integrationTestTask = 'integrationTest'

servlet/java-configuration/hello-security/gradle.properties

@@ -1 +0,0 @@
-tomcat85Version=8.5.54

servlet/java-configuration/hello-security/gradle/gretty.gradle

@@ -1,5 +1,5 @@
 gretty {
-	servletContainer = "tomcat85"
+	servletContainer = "tomcat9"
 	contextPath = "/"
 	fileLogEnabled = false
 	integrationTestTask = 'integrationTest'

servlet/java-configuration/max-sessions/gradle.properties

@@ -1 +0,0 @@
-tomcat85Version=8.5.54

servlet/java-configuration/max-sessions/gradle/gretty.gradle

@@ -1,5 +1,5 @@
 gretty {
-	servletContainer = "tomcat85"
+	servletContainer = "tomcat9"
 	contextPath = "/"
 	fileLogEnabled = false
 	integrationTestTask = 'integrationTest'