fix(supply): show manifest default version label in framework install log

- frameworkVersionSuffix now shows '(default: X.Y.Z)' instead of '(X.Y.Z)'
  making clear this is the manifest default, not necessarily the installed version
- Reverts java-cfenv DependencyIdentifier back to 'java-cfenv' (no hack needed)
- Removes extra Info log from JavaCfEnvFramework.Supply()
Result: single 'Installing Java CF Env (default: 3.5.1)' line; actual
installed version visible from libbuildpack install line

Author: stokpop

src/java/frameworks/java_cf_env.go

@@ -71,7 +71,6 @@ func (j *JavaCfEnvFramework) Supply() error {
 	} else {
 		j.context.Log.Debug("Resolved Java CF Env version pattern '%s' to %s", versionPattern, resolvedVersion)
 	}
-
 	// Install java-cfenv JAR
 	javaCfEnvDir := filepath.Join(j.context.Stager.DepDir(), "java_cf_env")
 	if err := j.context.Installer.InstallDependency(dep, javaCfEnvDir); err != nil {

src/java/frameworks/java_cf_env_test.go

@@ -219,6 +219,12 @@ var _ = Describe("Java CF Env", func() {
 		})
 	})
 
+	Describe("DependencyIdentifier", func() {
+		It("returns java-cfenv so supply.go can look up the manifest default version", func() {
+			Expect(fw.DependencyIdentifier()).To(Equal("java-cfenv"))
+		})
+	})
+
 	Describe("Finalize", func() {
 		Context("when the JAR is present", func() {
 			BeforeEach(func() {

src/java/supply/supply.go

@@ -181,5 +181,5 @@ func (s *Supplier) frameworkVersionSuffix(framework frameworks.Framework) string
 		return ""
 	}
 
-	return fmt.Sprintf(" (%s)", dependency.Version)
+	return fmt.Sprintf(" (default: %s)", dependency.Version)
 }