Include the Nodes dependency in the workspace to fix plugin builds

The Nodes dependency used for GraphQL communication in the Github Pull Request decorator is no longer available on Bintray due to Bintray being decommissioned, and is not available in the target version from any other repository. The JAR is therefore being included in the workspace and referenced directly in the build.gradle dependencies, and the Jackson dependency that was previously inherited through the Nodes dependency is being added directly to the project as a runtime dependency to ensure the relevant classes are still available during plugin execution.

build.gradle

@@ -29,9 +29,6 @@ group 'com.github.mc1arke.sonarqube.plugin'
 
 repositories {
     mavenCentral()
-    maven {
-        url 'https://dl.bintray.com/americanexpress/maven/'
-    }
     ivy {
         url 'https://binaries.sonarsource.com/'
         patternLayout({a ->
@@ -64,9 +61,8 @@ dependencies {
     testCompile group: 'com.github.tomakehurst', name: 'wiremock', version: '2.24.1'
     zip "sonarqube:sonarqube:${sonarqubeVersion}@zip"
     compile 'org.bouncycastle:bcpkix-jdk15on:1.62'
-    compile('io.aexp.nodes.graphql:nodes:0.5.0') {
-        exclude group: 'com.fasterxml.jackson.core'
-    }
+    compile files('lib/nodes-0.5.0.jar')
+    runtime 'com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.9.7'
     compileOnly 'com.google.code.findbugs:jsr305:3.0.2'
 }