Expose AspectJ 1.8.11 in POMs (and use it for all tests)

Issue: SPR-15974

build.gradle

@@ -41,7 +41,7 @@ configure(allprojects) { project ->
 	group = "org.springframework"
 	version = qualifyVersionIfNecessary(version)
 
-	ext.aspectjVersion       = "1.8.10"
+	ext.aspectjVersion       = "1.8.11"
 	ext.freemarkerVersion    = "2.3.26-incubating"
 	ext.groovyVersion        = "2.4.12"
 	ext.hsqldbVersion        = "2.4.0"

spring-aop/spring-aop.gradle

@@ -6,5 +6,4 @@ dependencies {
 	optional("org.aspectj:aspectjweaver:${aspectjVersion}")
 	optional("org.apache.commons:commons-pool2:2.4.2")
 	optional("com.jamonapi:jamon:2.81")
-	testRuntime("org.aspectj:aspectjweaver:1.9.0.BETA-7")  // for JDK 9 build compatibility
 }

spring-context/spring-context.gradle

@@ -29,5 +29,4 @@ dependencies {
 	testRuntime("javax.xml.bind:jaxb-api:2.3.0")
 	testRuntime("org.glassfish:javax.el:3.0.1-b08")
 	testRuntime("org.javamoney:moneta:1.1")
-	testRuntime("org.aspectj:aspectjweaver:1.9.0.BETA-7")  // for JDK 9 build compatibility
 }