KNOX-3278: Update rest-assured to 6.0.0 (needed for Groovy 5)

Author: bonampak

pom.xml

@@ -271,7 +271,7 @@
         <powermock.version>2.0.9</powermock.version>
         <purejavacomm.version>0.0.11.1</purejavacomm.version>
         <pty4j.version>0.12.4</pty4j.version>
-        <rest-assured.version>5.5.6</rest-assured.version>
+        <rest-assured.version>6.0.0</rest-assured.version>
         <shiro.version>1.13.0</shiro.version>
         <shiro-ehcache3.version>1.13.0</shiro-ehcache3.version>
         <shrinkwrap.version>1.2.6</shrinkwrap.version>