[NO ISSUE] Update log4j2 dependencies 2.14.1 -> 2.15.0

(cherry picked from commit 641196863c84bf1790e6f885508c8eb78a3e6511)

Change-Id: I685005dfffa27ea50fef15ba8c9466f0b4f812db
Reviewed-on: https://asterix-gerrit.ics.uci.edu/c/asterixdb/+/14485
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Michael Blow <mblow@apache.org>
Tested-by: Michael Blow <mblow@apache.org>
diff --git a/asterixdb/pom.xml b/asterixdb/pom.xml
index 49cdf32..933cfb1 100644
--- a/asterixdb/pom.xml
+++ b/asterixdb/pom.xml
@@ -86,7 +86,7 @@
     <hyracks.version>0.3.6-SNAPSHOT</hyracks.version>
     <hadoop.version>2.8.5</hadoop.version>
     <jacoco.version>0.7.6.201602180812</jacoco.version>
-    <log4j.version>2.14.1</log4j.version>
+    <log4j.version>2.15.0</log4j.version>
     <awsjavasdk.version>2.10.83</awsjavasdk.version>
     <azurejavasdk.version>12.12.0</azurejavasdk.version>
     <parquet.version>1.8.2</parquet.version>
diff --git a/hyracks-fullstack/pom.xml b/hyracks-fullstack/pom.xml
index 81970b4..c35af4f 100644
--- a/hyracks-fullstack/pom.xml
+++ b/hyracks-fullstack/pom.xml
@@ -72,7 +72,7 @@
     <!-- Versions under dependencymanagement or used in many projects via properties -->
     <hadoop.version>2.8.5</hadoop.version>
     <jacoco.version>0.7.6.201602180812</jacoco.version>
-    <log4j.version>2.14.1</log4j.version>
+    <log4j.version>2.15.0</log4j.version>
     <snappy.version>1.1.8.4</snappy.version>
 
     <implementation.title>Apache Hyracks and Algebricks - ${project.name}</implementation.title>