GitHub issue #96: Direct dependency on log4j framework

* Remove log4j dependency from spring-cloud-spring-service-connector build.gradle
   & version var in main build.gradle
* Remove log4j.properties files from test resource packages

Author: chrisjs

build.gradle

@@ -33,8 +33,6 @@ ext {
 
 	jacksonVersion = "2.3.3"
 
-	log4jVersion = "1.2.17"
-
 	junitVersion = "4.11"
 	mockitoVersion = "1.9.5"
 

spring-cloud-cloudfoundry-connector/src/test/resources/log4j.properties

@@ -5,7 +5,6 @@ dependencies {
   compile project(':spring-cloud-core')
 
   compile("org.springframework:spring-context:$springVersion")
-  compile("log4j:log4j:$log4jVersion")
 
   testCompile("org.springframework:spring-test:$springVersion")
   testCompile("mysql:mysql-connector-java:$mysqlDriverVersion")