SEC-1998: Provide integration with WebAsyncManager#startCallableProcessing

Support integration of the Spring SecurityContext on Callable's used with
WebAsyncManager by registering SecurityContextCallableProcessingInterceptor.

samples/cas/sample/cassample.gradle

@@ -30,7 +30,7 @@ eclipse.classpath.plusConfigurations += configurations.integrationTestRuntime
 dependencies {
     groovy 'org.codehaus.groovy:groovy:1.8.7'
 
-    providedCompile 'javax.servlet:servlet-api:2.5@jar'
+    providedCompile "org.apache.tomcat:tomcat-servlet-api:$servletApiVersion"
 
     compile project(':spring-security-core'),
             project(':spring-security-cas'),

samples/contacts/contacts.gradle

@@ -9,7 +9,7 @@ configurations {
 }
 
 dependencies {
-    providedCompile 'javax.servlet:servlet-api:2.5@jar'
+    providedCompile "org.apache.tomcat:tomcat-servlet-api:$servletApiVersion"
 
     compile project(':spring-security-core'),
             project(':spring-security-acl'),

samples/gae/gae.gradle

@@ -21,7 +21,7 @@ repositories {
 configurations.runtime.exclude(group: 'ch.qos.logback')
 
 dependencies {
-    providedCompile 'javax.servlet:servlet-api:2.5@jar'
+    providedCompile "org.apache.tomcat:tomcat-servlet-api:$servletApiVersion"
 
     compile project(':spring-security-core'),
             project(':spring-security-web'),

samples/jaas/jaas.gradle

@@ -14,7 +14,7 @@ configurations {
 }
 
 dependencies {
-    providedCompile 'javax.servlet:servlet-api:2.5@jar'
+    providedCompile "org.apache.tomcat:tomcat-servlet-api:$servletApiVersion"
 
     compile project(':spring-security-core'),
             "org.springframework:spring-beans:$springVersion",

samples/openid/openid.gradle

@@ -7,7 +7,7 @@ dependencies {
     compile project(':spring-security-core'),
             project(':spring-security-openid')
 
-    providedCompile 'javax.servlet:servlet-api:2.5@jar'
+    providedCompile "org.apache.tomcat:tomcat-servlet-api:$servletApiVersion"
 
     runtime project(':spring-security-config'),
             project(':spring-security-taglibs'),

samples/tutorial/tutorial.gradle

@@ -14,7 +14,7 @@ configurations {
 }
 
 dependencies {
-    providedCompile 'javax.servlet:servlet-api:2.5@jar'
+    providedCompile "org.apache.tomcat:tomcat-servlet-api:$servletApiVersion"
 
     compile project(':spring-security-core'),
             "org.springframework:spring-beans:$springVersion",