Change S3Proxy from memory to filesystem storage

This should avoid OutOfMemoryErrors seen with larger object sizes.
Enabled by fixes in S3Proxy 2.0.0.  Also change LC_ALL to en_US.UTF-8
and add locales packages so that S3Proxy can create Unicode file
names.  This commit requires Java 17 on macOS to allow creating
extended attributes for directories.

.github/workflows/ci.yml

@@ -144,7 +144,7 @@ jobs:
 
       - name: Install brew other packages
         run: |
-          S3FS_BREW_PACKAGES='automake cppcheck python3 coreutils gnu-sed shellcheck';
+          S3FS_BREW_PACKAGES='automake cppcheck python3 coreutils gnu-sed openjdk@17 shellcheck';
           for s3fs_brew_pkg in ${S3FS_BREW_PACKAGES}; do if brew list | grep -q ${s3fs_brew_pkg}; then if brew outdated | grep -q ${s3fs_brew_pkg}; then HOMEBREW_NO_AUTO_UPDATE=1 brew upgrade ${s3fs_brew_pkg}; fi; else HOMEBREW_NO_AUTO_UPDATE=1 brew install ${s3fs_brew_pkg}; fi; done;
 
       - name: Install awscli2

test/integration-test-common.sh

@@ -174,7 +174,7 @@ function start_s3proxy {
             S3PROXY_CACERT_FILE=""
         fi
 
-        "${STDBUF_BIN}" -oL -eL java -jar "${S3PROXY_BINARY}" --properties "${S3PROXY_CONFIG}" &
+        "${STDBUF_BIN}" -oL -eL java -Dfile.encoding=UTF8 -jar "${S3PROXY_BINARY}" --properties "${S3PROXY_CONFIG}" &
         S3PROXY_PID=$!
 
         # wait for S3Proxy to start

test/s3proxy.conf

@@ -5,6 +5,7 @@ s3proxy.credential=local-credential
 s3proxy.keystore-path=/tmp/keystore.jks
 s3proxy.keystore-password=password
 
-jclouds.provider=transient
+jclouds.provider=filesystem
 jclouds.identity=remote-identity
 jclouds.credential=remote-credential
+jclouds.filesystem.basedir=/var/tmp/blobstore