Don't make non-core packages a fragment bundle

as there exists no longer a dependency from smack (now smack-core) to
smackx (now mostly smack-extensions). Therefore this approach is no
longer needed.

SMACK-343

build.gradle

@@ -187,15 +187,6 @@ subprojects {
 	}
 }
 
-(subprojects - project(':smack-core'))*.jar {
-	manifest {
-		attributes('Bundle-SymbolicName': project.group + '-' + project.name,
-				   'Fragment-Host': project.group,
-				   'Eclipse-PatchFragment': 'true')
-		from sharedManifest
-	}
-}
-
 // This is not really beautifully, but it's the only way I found to add
 // the sub-projects description as description element to the POM
 subprojects*.uploadArchives {

smack-core/build.gradle

@@ -14,13 +14,7 @@ dependencies {
 	testCompile 'org.powermock:powermock-api-mockito:1.5.+'
 	testCompile 'com.jamesmurty.utils:java-xmlbuilder:0.6+'
 }
-jar {
-	manifest {
-		attributes('Bundle-SymbolicName': project.group,
-				   'Eclipse-ExtensibleAPI: true')
-		from sharedManifest
-	}
-}
+
 task compressionJar(type: Jar) {
 	appendix += '-compression'
 	dependsOn classes