Bazel: enable logging for tests in org.eclipse.jgit.test

- use slf4j-simple for logging in test runs
- for log configuration see
https://www.slf4j.org/api/org/slf4j/impl/SimpleLogger.html

Change-Id: I9f0a532644b31162c867cd0d63f083296eaf6be5
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit.test/BUILD

@@ -42,6 +42,7 @@ java_library(
     resources = DATA,
     deps = [
         "//lib:junit",
+        "//lib:slf4j-simple",
         "//org.eclipse.jgit:jgit",
         "//org.eclipse.jgit.junit:junit",
     ],

org.eclipse.jgit.test/tst-rsrc/log4j.properties

@@ -7,8 +7,8 @@ log4j.appender.stdout=org.apache.log4j.ConsoleAppender
 log4j.appender.stdout.Target=System.out
 log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
 log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
-#log4j.appender.fileLogger.bufferedIO = true
-#log4j.appender.fileLogger.bufferSize = 4096
+log4j.appender.fileLogger.bufferedIO = true
+log4j.appender.fileLogger.bufferSize = 4096
 
-#log4j.logger.org.eclipse.jgit.util.FS = DEBUG
+log4j.logger.org.eclipse.jgit.util.FS = DEBUG
 #log4j.logger.org.eclipse.jgit.internal.storage.file.FileSnapshot = DEBUG

org.eclipse.jgit.test/tst-rsrc/simplelogger.properties

@@ -0,0 +1,9 @@
+org.slf4j.simpleLogger.logFile = System.err
+org.slf4j.simpleLogger.cacheOutputStream = true
+org.slf4j.simpleLogger.defaultLogLevel = info
+org.slf4j.simpleLogger.showDateTime = true
+org.slf4j.simpleLogger.dateTimeFormat = HH:mm:ss.SSSXXX
+org.slf4j.simpleLogger.showThreadName = true
+
+#org.slf4j.simpleLogger.log.org.eclipse.jgit.util.FS = debug
+#org.slf4j.simpleLogger.log.org.eclipse.jgit.internal.storage.file.FileSnapshot = debug