Make drydock case sensitive in attribute parsing

Summary: See D4047. Get rid of this strtolower() junk.

Test Plan:
```
$ /bin/drydock lease --type working-copy --attributes repositoryID=12
Acquired Lease 66
```

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T2015

Differential Revision: https://secure.phabricator.com/D4048

src/applications/drydock/management/DrydockManagementLeaseWorkflow.php

@@ -34,6 +34,7 @@ final class DrydockManagementLeaseWorkflow
     $attributes = $args->getArg('attributes');
     if ($attributes) {
       $options = new PhutilSimpleOptions();
+      $options->setCaseSensitive(true);
       $attributes = $options->parse($attributes);
     }
 

src/applications/drydock/storage/DrydockLease.php

@@ -26,12 +26,12 @@ final class DrydockLease extends DrydockDAO {
   }
 
   public function setAttribute($key, $value) {
-    $this->attributes[strtolower($key)] = $value;
+    $this->attributes[$key] = $value;
     return $this;
   }
 
   public function getAttribute($key, $default = null) {
-    return idx($this->attributes, strtolower($key), $default);
+    return idx($this->attributes, $key, $default);
   }
 
   public function generatePHID() {

src/infrastructure/celerity/__tests__/CelerityResourceTransformerTestCase.php

@@ -15,7 +15,8 @@ final class CelerityResourceTransformerTestCase extends PhabricatorTestCase {
 
       list($options, $in, $expect) = $parts;
 
-      $options = PhutilSimpleOptions::parse($options) + array(
+      $parser = new PhutilSimpleOptions();
+      $options = $parser->parse($options) + array(
         'minify' => false,
         'name'   => $name,
       );

src/infrastructure/markup/rule/PhabricatorRemarkupRuleEmbedFile.php

@@ -43,7 +43,8 @@ final class PhabricatorRemarkupRuleEmbedFile
 
     if (!empty($matches[2])) {
       $matches[2] = trim($matches[2], ', ');
-      $options = PhutilSimpleOptions::parse($matches[2]) + $options;
+      $parser = new PhutilSimpleOptions();
+      $options = $parser->parse($matches[2]) + $options;
     }
     $file_name = coalesce($options['name'], $file->getName());
     $options['name'] = $file_name;