[Java] Only apply shadow to all and benchmarks.

Author: mjpt777

build.gradle

@@ -103,7 +103,6 @@ subprojects {
     apply plugin: 'signing'
     apply plugin: 'checkstyle'
     apply plugin: 'eclipse'
-    apply plugin: 'com.github.johnrengelman.shadow'
 
     group = sbeGroup
     version = sbeVersion
@@ -151,7 +150,6 @@ subprojects {
     signing {
         required { isReleaseVersion && gradle.taskGraph.hasTask("uploadArchives") }
         sign configurations.archives
-        sign configurations.shadow
     }
 
     install {
@@ -307,6 +305,11 @@ project(':sbe-all') {
         archives sourcesJar
         archives javadocJar
     }
+
+    signing {
+        required { isReleaseVersion && gradle.taskGraph.hasTask("uploadArchives") }
+        sign configurations.shadow
+    }
 }
 
 project(':sbe-samples') {
@@ -465,6 +468,11 @@ project(':sbe-benchmarks') {
         archives sourcesJar
         archives javadocJar
     }
+
+    signing {
+        required { isReleaseVersion && gradle.taskGraph.hasTask("uploadArchives") }
+        sign configurations.shadow
+    }
 }
 
 /*