Upgrade all Athenz Java libraries to 1.8.49
<apache.httpcore.version>4.4.13</apache.httpcore.version>
<asm.version>7.0</asm.version>
<!-- Athenz dependencies. Make sure these dependencies match those in Vespa's internal repositories -->
- <athenz.version>1.8.44</athenz.version>
+ <athenz.version>1.8.49</athenz.version>
<aws.sdk.version>1.11.542</aws.sdk.version>
<!-- WARNING: If you change curator version, you also need to update
zkfacade/src/main/java/org/apache/curator/**/package-info.java
