Fix publishing jaeger-thrift shadow artifact (#704)

Signed-off-by: Zbigniew Halas <[email protected]>

Author: zhalas

jaeger-thrift/build.gradle

@@ -80,3 +80,17 @@ artifacts {
     }
     tests testJar
 }
+
+publishing {
+    publications {
+        shadow(MavenPublication) { publication ->
+            project.shadow.component(publication)
+        }
+    }
+}
+
+signing {
+    if (isReleaseVersion) {
+        sign publishing.publications.shadow
+    }
+}