DHFPROD-3448: upgrade our java api client to head of 4.x branch

Author: aebadirad

marklogic-data-hub/build.gradle

@@ -24,7 +24,7 @@ ext.junitPlatformVersion = '1.0.0-RC3'
 ext.junitJupiterVersion  = '5.0.0-RC3'
 
 dependencies {
-    compile 'com.marklogic:marklogic-client-api:4.0.3.1'
+    compile 'com.marklogic:marklogic-client-api:4.2.0'
     compile 'com.marklogic:mlcp-util:0.9.0'
     compile 'com.marklogic:ml-app-deployer:3.10.1'
     compile 'commons-io:commons-io:2.4'