Re-add build cache configuration.

buildCacheSettings.gradle

@@ -0,0 +1,16 @@
+// Gradle Build Cache configuration recommendation: https://docs.gradle.org/current/userguide/build_cache.html
+ext {
+    isCiServer = System.getenv().containsKey("CORDA_CI")
+    gradleBuildCacheURL = System.getenv().containsKey("GRADLE_BUILD_CACHE_URL") ? System.getenv().get("GRADLE_BUILD_CACHE_URL") : 'http://localhost:5071/cache/'
+}
+
+buildCache {
+    local {
+        enabled = !isCiServer
+    }
+    remote(HttpBuildCache) {
+        enabled = isCiServer
+        url = gradleBuildCacheURL
+        push = isCiServer
+    }
+}

settings.gradle

@@ -122,24 +122,8 @@ include 'common-logging'
 project(":common-logging").projectDir = new File("$settingsDir/common/logging")
 // Common libraries - end
 
+apply from: 'buildCacheSettings.gradle'
 
 include 'detekt-plugins'
 include 'tools:error-tool'
 
-buildCache {
-    local { enabled = false }
-    remote(HttpBuildCache) {
-        url = "${gradleEnterpriseUrl}/cache/"
-        credentials {
-            username = settings.ext.find('BUILD_CACHE_CREDENTIALS_USR') ?: System.getenv('BUILD_CACHE_CREDENTIALS_USR')
-            password = settings.ext.find('BUILD_CACHE_CREDENTIALS_PSW') ?: System.getenv('BUILD_CACHE_CREDENTIALS_PSW')
-        }
-        if (System.getenv().containsKey("JENKINS_URL")) {
-            push = true
-            enabled = true
-        } else {
-            push = false
-            enabled = false
-        }
-    }
-}