resolve only resolvable configurations

build.gradle

@@ -238,6 +238,14 @@ def getPomConfiguration() {
 // download dependencies all at once, keeps downloads out of travis output
 task resolveAllDependencies {
     doLast {
-        configurations.all { it.resolve() }
+        configurations.all { configuration ->
+            if (configuration.isCanBeResolved()) {
+                println "Resolving $configuration"
+                configuration.resolve()
+            }
+            else {
+                println "$configuration is not resolvable"
+            }
+        }
     }
 }