Update logback-version to 1.2.3

Update logback-version to 1.2.3 to address address threat CVE-2017-5929.

Author: msymons

pom.xml

@@ -498,7 +498,7 @@
         <jersey-version>1.13</jersey-version>
         <jersey2-version>2.25.1</jersey2-version>
         <jackson-version>2.8.7</jackson-version>
-        <logback-version>1.0.1</logback-version>
+        <logback-version>1.2.3</logback-version>
         <reflections-version>0.9.11</reflections-version>
         <guava-version>20.0</guava-version>
         <javassist-version>3.21.0-GA</javassist-version>