Added metadata filtering of tool used for SBOM production

The SBOM format has a section for identifying tool used to produce the file - this was previously left empty.

build.gradle

@@ -1,4 +1,3 @@
-
 plugins {
     id 'java-gradle-plugin'
     id 'com.gradle.plugin-publish' version '0.12.0'
@@ -35,6 +34,22 @@ tasks.withType(JavaCompile) {
     options.encoding = 'UTF-8'
 }
 
+def pluginProperties = [
+        'vendor': 'CycloneDX',
+        'name': 'CycloneDX Gradle plugin',
+        'version': project.version,
+        'groupId': project.group,
+        'artifactId': project.name,
+] as Properties
+
+def filterPluginProperties = tasks.register('filterPluginProperties', Copy) {
+    destinationDir = file("$buildDir/resources/filter")
+    inputs.properties pluginProperties
+    from('src/main/filter')
+    expand(pluginProperties)
+}
+sourceSets.main.resources.srcDirs filterPluginProperties
+
 pluginBundle {
     website = 'https://cyclonedx.org'
     vcsUrl = 'https://github.com/CycloneDX/cyclonedx-gradle-plugin.git'

src/main/filter/cyclonedx-gradle-plugin.properties

@@ -0,0 +1,7 @@
+# Automatically populated by Gradle build - do not modify
+vendor=${vendor}
+name=${name}
+version=${version}
+groupId=${groupId}
+artifactId=${artifactId}
+timestamp=${System.currentTimeMillis()}

src/main/java/org/cyclonedx/gradle/CycloneDxTask.java

@@ -280,9 +280,9 @@ protected Metadata createMetadata() {
     private Properties readPluginProperties() {
         final Properties props = new Properties();
         try {
-            props.load(this.getClass().getClassLoader().getResourceAsStream("plugin.properties"));
+            props.load(this.getClass().getClassLoader().getResourceAsStream("cyclonedx-gradle-plugin.properties"));
         } catch (NullPointerException | IOException e) {
-            getLogger().warn("Unable to load plugin.properties", e);
+            getLogger().warn("cyclonedx-gradle-plugin.properties", e);
         }
         return props;
     }