Added slf4j library and mark servlet api as provided

connector-service/build.gradle

@@ -27,10 +27,12 @@ dependencies {
 	compile group: 'org.springframework.security', name: 'spring-security-config', version: springSecurityVersion
 	compile group: 'org.springframework.security', name: 'spring-security-ldap', version: springSecurityVersion
 	compile group: 'mysql', name: 'mysql-connector-java', version: '5.1.30'
-	compile group: 'javax.servlet', name: 'javax.servlet-api', version: '3.0.1'
 	compile group: 'org.hsqldb', name: 'hsqldb', version: '2.3.2'
 	compile group: 'cglib', name: 'cglib', version: '3.1'
 	compile group: 'org.apache.openjpa', name: 'openjpa', version: '2.3.0'
+	compile group: 'org.slf4j', name: 'slf4j-log4j12', version: '1.7.7'
+
+	providedCompile group: 'javax.servlet', name: 'javax.servlet-api', version: '3.0.1'
 
 	testCompile group: 'junit', name: 'junit', version: '4.11'
 	testCompile group: 'org.mockito', name: 'mockito-core', version: '1.9.5'