Conditional Basic Auth

Previously, basic auth headers were added to every DownloadCache
request.  In the case where there were no basic auth credentials,
empty strings were used for the username and password.  This was
wrong, although tolerated by the primarily used CloudFront.  This
change ensures that basic auth headers are only added when there are
both a username and password specified.

[#72253796]

Author: nebhale

.idea/copyright/profiles_settings.xml

@@ -257,10 +257,9 @@
   </component>
   <component name="NewModuleRootManager" inherit-compiler-output="false">
     <content url="file://$MODULE_DIR$">
-      <sourceFolder url="file://$MODULE_DIR$/lib/java_buildpack" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/bin" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/spec/bin" isTestSource="true" />
-      <sourceFolder url="file://$MODULE_DIR$/spec/java_buildpack" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/lib" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/spec" isTestSource="true" />
       <excludeFolder url="file://$MODULE_DIR$/.idea" />
       <excludeFolder url="file://$MODULE_DIR$/.yardoc" />
       <excludeFolder url="file://$MODULE_DIR$/build" />
@@ -303,7 +302,7 @@
     <orderEntry type="library" scope="PROVIDED" name="yard (v0.8.7.4, rbenv: 1.9.3-p545) [gem]" level="application" />
   </component>
   <component name="RModuleSettingsStorage">
-    <LOAD_PATH number="2" string0="$MODULE_DIR$/lib" string1="$MODULE_DIR$/spec" />
+    <LOAD_PATH number="4" string0="$MODULE_DIR$/lib" string1="$MODULE_DIR$/spec" string2="$MODULE_DIR$/bin" string3="$MODULE_DIR$/spec/bin" />
     <I18N_FOLDERS number="0" />
   </component>
 </module>

java-buildpack.iml

@@ -242,7 +242,7 @@ def update(uri, cached_file)
           proxy(uri).start(uri.host, uri.port, http_options(uri)) do |http|
             @logger.debug { "HTTP: #{http.address}, #{http.port}, #{http_options(uri)}" }
             request = request uri, cached_file
-            request.basic_auth uri.user, uri.password
+            request.basic_auth uri.user, uri.password if uri.user && uri.password
 
             failures = 0
             begin