Fixed Gradle build and added Snyk badge

Signed-off-by: Decker, Stefan <Stefan.Decker@gdata.de>

README.md

@@ -1,4 +1,4 @@
-# Graylog AlertManager Notification Plugin [![Build Status](https://travis-ci.org/GDATASoftwareAG/Graylog-Plugin-AlertManager-Callback.svg?branch=master)](https://travis-ci.org/GDATASoftwareAG/Graylog-Plugin-AlertManager-Callback)
+# Graylog AlertManager Notification Plugin [![Build Status](https://travis-ci.org/GDATASoftwareAG/Graylog-Plugin-AlertManager-Callback.svg?branch=master)](https://travis-ci.org/GDATASoftwareAG/Graylog-Plugin-AlertManager-Callback) [![Known Vulnerabilities](https://snyk.io/test/github/GDATASoftwareAG/Graylog-Plugin-AlertManager-Callback/badge.svg)](https://snyk.io/test/github/GDATASoftwareAG/Graylog-Plugin-AlertManager-Callback) 
 This plugin can be used for connecting [Graylog](https://www.graylog.org/) alerts to the [Prometheus](https://prometheus.io/) [AlertManager](https://prometheus.io/docs/alerting/alertmanager/).
 
 The plugin development is based on [Graylog2/graylog-plugin-sample](https://github.com/Graylog2/graylog-plugin-sample) which is mentioned in the [Graylog plugin documentation](http://docs.graylog.org/en/2.4/pages/plugins.html).

build.gradle

@@ -10,16 +10,7 @@ buildscript {
 }
 
 
-def title = "mOPS_Graylog_AlertManagerNotificationPlugin"
-
-def getVersionName = { ->
-    def stdout = new ByteArrayOutputStream()
-    exec {
-        commandLine 'git', 'describe', '--tags', '--long'
-        standardOutput = stdout
-    }
-    return stdout.toString().trim()
-}
+def title = "Graylog-Plugin-AlertManager-Callback"
 
 apply plugin: "com.github.harbby.gradle.serviceloader"
 apply plugin: 'java'
@@ -35,7 +26,7 @@ serviceLoader {
 }
 
 group = 'de.gdata.mobilelab'
-version = getVersionName()
+version = 0.1
 
 sourceCompatibility = 1.8
 targetCompatibility = 1.8
@@ -79,14 +70,14 @@ dependencies {
 }
 
 jar {
-    archiveName = "graylog-plugin-alertmanagercallback-" + getVersionName() + ".jar"
+    archiveName = "graylog-plugin-alertmanagercallback-" + version + ".jar"
     baseName = title
-    version = getVersionName()
+    version = 0.1
     group = "de.gdata.mobilelab.alertmanagercallback"
     manifest {
         attributes(
                 'Implementation-Title': title,
-                'Implementation-Version': getVersionName(),
+                'Implementation-Version': version,
                 'Build-Time': new Date().format("yyy-MM-dd HH:mm:ss"),
                 'Graylog-Plugin-Properties-Path': 'de.gdata.mobilelab.alertmanagercallback.graylog-plugin-alertmanagercallback'
         )