HHH-8601 remove slf4j infavor of log4j

Author: stliu

build.gradle

@@ -124,8 +124,7 @@ subprojects { subProject ->
             testCompile( libraries.byteman_install )
             testCompile( libraries.byteman_bmunit )
 
-            testRuntime( libraries.slf4j_api )
-            testRuntime( libraries.slf4j_log4j12 )
+            testRuntime( libraries.log4j )
             testRuntime( libraries.javassist )
             testRuntime( libraries.h2 )
 

documentation/documentation.gradle

@@ -79,7 +79,7 @@ task buildTutorialZip(type: Zip) {
     from 'src/main/docbook/quickstart/tutorials'
     expand(
             version: project.version,
-            slf4j: parent.slf4jVersion,
+            slf4j: "1.7.5",
             junit: parent.junitVersion,
             h2: parent.h2Version
     )

libraries.gradle

@@ -27,7 +27,6 @@
 // use.  In that respect it serves a role similar to <dependencyManagement> in Maven
 ext {
 
-    slf4jVersion = '1.7.5'
     junitVersion = '4.11'
     h2Version = '1.2.145'
     bytemanVersion = '2.1.2'
@@ -80,9 +79,7 @@ ext {
             // ~~~~~~~~~~~~~~~~~~~~~~~~~~ testing
 
             // logging for testing
-            slf4j_api:      "org.slf4j:slf4j-api:${slf4jVersion}",
-            slf4j_log4j12:  "org.slf4j:slf4j-log4j12:${slf4jVersion}",
-
+            log4j:          "log4j:log4j:1.2.17",
             junit:           "junit:junit:${junitVersion}",
             byteman:         "org.jboss.byteman:byteman:${bytemanVersion}",
             byteman_install: "org.jboss.byteman:byteman-install:${bytemanVersion}",