Update to Kotlin 1.60 and Gradle 4.9

Removes the dependency on legacy script compilation and now relies on script
discovery.  In addition, the Gradle build scripts were refactored and updated
to be compatible with Gradle 5.0 and make use of the new java-library
configurations.

gradle/jacoco.gradle

@@ -0,0 +1,59 @@
+apply plugin: "jacoco"
+
+allprojects {
+    tasks.withType(Test) {
+        jacoco {
+            toolVersion = '0.8.1'
+        }
+
+        afterEvaluate {
+            jacocoTestReport {
+                dependsOn tasks.test
+
+                sourceSets sourceSets.main
+                reports {
+                    html.enabled = true
+                    xml.enabled = true
+                    csv.enabled = false
+                }
+            }
+        }
+    }
+}
+
+task jacocoTestReport(type: JacocoReport) {
+    sourceDirectories = files()
+    classDirectories = files()
+    executionData = files()
+
+    reports {
+        html.enabled = true
+        xml.enabled = true
+        csv.enabled = false
+    }
+
+    // Work-around to allow us to build list of executionData files in doFirst
+    onlyIf = {
+        true
+    }
+
+    /*
+     * Builds list of source dirs, class dirs, and executionData files
+     * when task is run, not at script evaluation time
+     */
+    doFirst {
+        subprojects.findAll { subproject ->
+            subproject.pluginManager.hasPlugin('java')
+        }.each { subproject ->
+            additionalSourceDirs files((Set<File>) subproject.sourceSets.main.allJava.srcDirs)
+            additionalClassDirs((FileCollection) subproject.sourceSets.main.output)
+            if (subproject.pluginManager.hasPlugin('jacoco')) {
+                executionData subproject.tasks.jacocoTestReport.executionData
+            }
+        }
+
+        executionData = files(executionData.findAll {
+            it.exists()
+        })
+    }
+}

gradle/kotlin.gradle

@@ -0,0 +1,5 @@
+allprojects {
+    plugins.withId('kotlin') {
+        kotlin { experimental { coroutines 'enable' } }
+    }
+}

gradle/properties.gradle

@@ -0,0 +1,14 @@
+ext {
+    kotlinVersion = '1.2.60'
+    kotlinxCoroutinesVersion = '0.24.0'
+    junitVersion = '4.12'
+    powermockVersion = '1.6.4'
+    bouncycastleVersion = '1.54'
+    c3p0Version = '0.9.5.2'
+    scryptVersion = '1.4.0'
+    nettyVersion = '4.0.34.Final'
+    guavaVersion = '19.0'
+    commonsCompressVersion = '1.10'
+    assertjVersion = '3.8.0'
+    classpathScannerVersion = '2.0.21'
+}