Replace findbugs with SpotBugs plugin.

Author: greenrobot-team

build.gradle

@@ -31,6 +31,13 @@ buildscript {
     repositories {
         mavenCentral()
         jcenter()
+        maven {
+            url "https://plugins.gradle.org/m2/"
+        }
+    }
+
+    dependencies {
+        classpath "gradle.plugin.com.github.spotbugs.snom:spotbugs-gradle-plugin:4.0.5"
     }
 }
 

objectbox-java/build.gradle

@@ -1,20 +1,12 @@
 apply plugin: 'java'
-apply plugin: 'findbugs'
+apply plugin: "com.github.spotbugs"
 
 group = 'io.objectbox'
 version= rootProject.version
 
 sourceCompatibility = JavaVersion.VERSION_1_8
 targetCompatibility = JavaVersion.VERSION_1_8
 
-tasks.withType(FindBugs) {
-    reports {
-        xml.enabled false
-        html.enabled true
-    }
-    ignoreFailures = true
-}
-
 dependencies {
     compile fileTree(include: ['*.jar'], dir: 'libs')
     compile project(':objectbox-java-api')
@@ -23,6 +15,10 @@ dependencies {
     compile 'com.google.code.findbugs:jsr305:3.0.2'
 }
 
+spotbugs {
+    ignoreFailures = true
+}
+
 javadoc {
     // Hide internal API from javadoc artifact.
     exclude("**/io/objectbox/Cursor.java")