[LIVY-477][BUILD] Upgrade Scala version to 2.11.12
## What changes were proposed in this pull request?
Scala version below 2.11.12 has CVE (https://scala-lang.org/news/security-update-nov17.html), and Spark will also upgrade its supported version to 2.11.12.
So here upgrading Livy's Scala version also.
## How was this patch tested?
Existing tests.
Author: jerryshao <sshao@hortonworks.com>
Closes #100 from jerryshao/LIVY-477.
diff --git a/pom.xml b/pom.xml
index 0bdf6f9..bcb2dfb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -101,7 +101,7 @@
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<py4j.version>0.9</py4j.version>
<scala-2.10.version>2.10.4</scala-2.10.version>
- <scala-2.11.version>2.11.8</scala-2.11.version>
+ <scala-2.11.version>2.11.12</scala-2.11.version>
<scala.binary.version>2.11</scala.binary.version>
<scala.version>${scala-2.11.version}</scala.version>
<scalatest.version>2.2.4</scalatest.version>