Revert jetty 9.4.9 upgrade that broke non-preemptive auth

Author: slandelle

pom.xml

@@ -409,7 +409,7 @@
     <rxjava2.version>2.1.13</rxjava2.version>
     <logback.version>1.2.3</logback.version>
     <testng.version>6.13.1</testng.version>
-    <jetty.version>9.4.9.v20180320</jetty.version>
+    <jetty.version>9.4.8.v20171121</jetty.version>
     <tomcat.version>9.0.7</tomcat.version>
     <commons-io.version>2.6</commons-io.version>
     <commons-fileupload.version>1.3.3</commons-fileupload.version>