Plug leak in handleCompleteMultipartUpload

In jclouds 2.6.0 BlobStore.getBlob returns an InputStream instead of a
ByteSource for the filesystem.  Previously the call site leaked the
former since it only consumed the BlobMetadata.  Instead call
BlobStore.blobMedata which does not include the payload.
Fixes JCLOUDS-1626.

pom.xml

@@ -297,7 +297,7 @@
       <plugin>
         <groupId>com.github.spotbugs</groupId>
         <artifactId>spotbugs-maven-plugin</artifactId>
-        <version>4.8.3.0</version>
+        <version>4.8.3.1</version>
         <configuration>
           <effort>Max</effort>
           <omitVisitors>CrossSiteScripting,DefaultEncodingDetector,FindNullDeref</omitVisitors>
@@ -363,7 +363,7 @@
     <java.version>11</java.version>
     <jclouds.version>2.6.0-SNAPSHOT</jclouds.version>
     <jetty.version>11.0.20</jetty.version>
-    <slf4j.version>2.0.11</slf4j.version>
+    <slf4j.version>2.0.12</slf4j.version>
     <shade.prefix>${project.groupId}.shaded</shade.prefix>
     <surefire.version>3.0.0</surefire.version>
   </properties>
@@ -399,7 +399,7 @@
     <dependency>
       <groupId>ch.qos.logback</groupId>
       <artifactId>logback-classic</artifactId>
-      <version>1.4.14</version>
+      <version>1.5.1</version>
     </dependency>
     <dependency>
       <groupId>javax.xml.bind</groupId>
@@ -416,14 +416,14 @@
     <dependency>
       <groupId>org.junit.jupiter</groupId>
       <artifactId>junit-jupiter</artifactId>
-      <version>5.9.0</version>
+      <version>5.10.2</version>
       <!-- Required for S3ProxyExtension -->
       <scope>provided</scope>
     </dependency>
     <dependency>
       <groupId>com.fasterxml.jackson.dataformat</groupId>
       <artifactId>jackson-dataformat-xml</artifactId>
-      <version>2.13.3</version>
+      <version>2.16.1</version>
     </dependency>
     <dependency>
       <groupId>com.github.spotbugs</groupId>

src/main/java/org/gaul/s3proxy/S3ProxyHandler.java

@@ -2253,7 +2253,7 @@ public class S3ProxyHandler {
         PutOptions options;
         if (Quirks.MULTIPART_REQUIRES_STUB.contains(getBlobStoreType(
                 blobStore))) {
-            metadata = blobStore.getBlob(containerName, uploadId).getMetadata();
+            metadata = blobStore.blobMetadata(containerName, uploadId);
             BlobAccess access = blobStore.getBlobAccess(containerName,
                     uploadId);
             options = new PutOptions().setBlobAccess(access);
@@ -2632,6 +2632,7 @@ public class S3ProxyHandler {
                 blobName, uploadId, createFakeBlobMetadata(blobStore),
                 new PutOptions());
 
+        // TODO: Blob can leak on precondition failures.
         Blob blob = blobStore.getBlob(sourceContainerName, sourceBlobName,
                 options);
         if (blob == null) {