Upgrade to OkHttp 3.9 and removal of superfluous spring-jcl reference

build.gradle

@@ -58,7 +58,7 @@ configure(allprojects) { project ->
 	ext.kotlinVersion        = '1.1.4-3'
 	ext.log4jVersion         = '2.9.0'
 	ext.nettyVersion         = "4.1.15.Final"
-	ext.okhttp3Version       = "3.8.1"
+	ext.okhttp3Version       = "3.9.0"
 	ext.reactorVersion       = "Bismuth-BUILD-SNAPSHOT"
 	ext.rxjavaVersion        = '1.3.0'
 	ext.rxjavaAdapterVersion = '1.2.1'

spring-expression/spring-expression.gradle

@@ -1,6 +1,5 @@
 description = "Spring Expression Language (SpEL)"
 
 dependencies {
-	compile(project(":spring-jcl"))
 	compile(project(":spring-core"))
 }