[LIVY-460][SERVER] Remove misleading log prefix
## What changes were proposed in this pull request?
Removing misleading log prefix "stdout: " for the captured stdout/stderr of spark-submit process
## How was this patch tested?
N/A
Author: jerryshao <sshao@hortonworks.com>
Closes #89 from jerryshao/LIVY-460.
diff --git a/server/src/main/scala/org/apache/livy/utils/LineBufferedStream.scala b/server/src/main/scala/org/apache/livy/utils/LineBufferedStream.scala
index 3298c9d..6896d2f 100644
--- a/server/src/main/scala/org/apache/livy/utils/LineBufferedStream.scala
+++ b/server/src/main/scala/org/apache/livy/utils/LineBufferedStream.scala
@@ -38,7 +38,7 @@
override def run() = {
val lines = Source.fromInputStream(inputStream).getLines()
for (line <- lines) {
- info(s"stdout: $line")
+ info(line)
_lock.lock()
try {
_lines.add(line)
