Update SLF4J dependency to latest version 1.7.29.

.classpath

 	<classpathentry kind="lib" path="ext/guice-servlet-4.0-gb2.jar" sourcepath="ext/src/guice-servlet-4.0-gb2.jar" />
 	<classpathentry kind="lib" path="ext/annotations-12.0.jar" sourcepath="ext/src/annotations-12.0.jar" />
 	<classpathentry kind="lib" path="ext/log4j-1.2.17.jar" sourcepath="ext/src/log4j-1.2.17.jar" />
-	<classpathentry kind="lib" path="ext/slf4j-api-1.7.12.jar" sourcepath="ext/src/slf4j-api-1.7.12.jar" />
-	<classpathentry kind="lib" path="ext/slf4j-log4j12-1.7.12.jar" sourcepath="ext/src/slf4j-log4j12-1.7.12.jar" />
+	<classpathentry kind="lib" path="ext/slf4j-api-1.7.29.jar" sourcepath="ext/src/slf4j-api-1.7.29.jar" />
+	<classpathentry kind="lib" path="ext/slf4j-log4j12-1.7.29.jar" sourcepath="ext/src/slf4j-log4j12-1.7.29.jar" />
 	<classpathentry kind="lib" path="ext/javax.mail-1.5.1.jar" sourcepath="ext/src/javax.mail-1.5.1.jar" />
 	<classpathentry kind="lib" path="ext/javax.servlet-api-3.1.0.jar" sourcepath="ext/src/javax.servlet-api-3.1.0.jar" />
 	<classpathentry kind="lib" path="ext/jetty-all-9.2.13.v20150730.jar" sourcepath="ext/src/jetty-all-9.2.13.v20150730.jar" />

build.moxie

 # Convenience properties for dependencies
 properties: {
   jetty.version  : 9.2.13.v20150730
-  slf4j.version  : 1.7.12
+  slf4j.version  : 1.7.29
   wicket.version : 1.4.22
   lucene.version : 5.5.2
   jgit.version   : 4.1.1.201511131810-r

gitblit.iml

       </library>
     </orderEntry>
     <orderEntry type="module-library">
-      <library name="slf4j-api-1.7.12.jar">
+      <library name="slf4j-api-1.7.29.jar">
         <CLASSES>
-          <root url="jar://$MODULE_DIR$/ext/slf4j-api-1.7.12.jar!/" />
+          <root url="jar://$MODULE_DIR$/ext/slf4j-api-1.7.29.jar!/" />
         </CLASSES>
         <JAVADOC />
         <SOURCES>
-          <root url="jar://$MODULE_DIR$/ext/src/slf4j-api-1.7.12.jar!/" />
+          <root url="jar://$MODULE_DIR$/ext/src/slf4j-api-1.7.29.jar!/" />
         </SOURCES>
       </library>
     </orderEntry>
     <orderEntry type="module-library">
-      <library name="slf4j-log4j12-1.7.12.jar">
+      <library name="slf4j-log4j12-1.7.29.jar">
         <CLASSES>
-          <root url="jar://$MODULE_DIR$/ext/slf4j-log4j12-1.7.12.jar!/" />
+          <root url="jar://$MODULE_DIR$/ext/slf4j-log4j12-1.7.29.jar!/" />
         </CLASSES>
         <JAVADOC />
         <SOURCES>
-          <root url="jar://$MODULE_DIR$/ext/src/slf4j-log4j12-1.7.12.jar!/" />
+          <root url="jar://$MODULE_DIR$/ext/src/slf4j-log4j12-1.7.29.jar!/" />
         </SOURCES>
       </library>
     </orderEntry>