Upgrade httpclient to 4.5.11 and httpcore to 4.4.13
The new versions contain several SSL and connection manager related fixes:
<properties>
<antlr.version>3.5.2</antlr.version>
<antlr4.version>4.5</antlr4.version>
- <apache.httpclient.version>4.5.10</apache.httpclient.version>
- <apache.httpcore.version>4.4.12</apache.httpcore.version>
+ <apache.httpclient.version>4.5.11</apache.httpclient.version>
+ <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>
