bitbake: server/process: Fix unclosed socket warnings upon server connection refused

Extend the server error handling to avoid:

Reconnecting to bitbake server...
NOTE: Retrying server connection... (Traceback (most recent call last):
  File "/home/pokybuild/yocto-worker/nightly-oe-selftest/build/bitbake/lib/bb/main.py", line 464, in setup_bitbake
    server_connection = bb.server.process.connectProcessServer(sockname, featureset)
  File "/home/pokybuild/yocto-worker/nightly-oe-selftest/build/bitbake/lib/bb/server/process.py", line 457, in connectProcessServer
    sock.connect(os.path.basename(sockname))
ConnectionRefusedError: [Errno 111] Connection refused
)
WARNING: /home/pokybuild/yocto-worker/nightly-oe-selftest/build/bitbake/lib/bb/main.py:481: ResourceWarning: unclosed <socket.socket fd=20, family=AddressFamily.AF_UNIX, type=SocketKind.SOCK_STREAM, proto=0>
  logger.info("Retrying server connection... (%s)" % traceback.format_exc())

NOTE: Starting bitbake server...

(Bitbake rev: afee3f594e1510051a0b18e430e92549caf72fa2)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/server/process.py

@@ -453,15 +453,14 @@ def connectProcessServer(sockname, featureset):
     cwd = os.getcwd()
 
     try:
-        os.chdir(os.path.dirname(sockname))
-        sock.connect(os.path.basename(sockname))
-    finally:
-        os.chdir(cwd)
+        try:
+            os.chdir(os.path.dirname(sockname))
+            sock.connect(os.path.basename(sockname))
+        finally:
+            os.chdir(cwd)
 
-    readfd = writefd = readfd1 = writefd1 = readfd2 = writefd2 = None
-    eq = command_chan_recv = command_chan = None
-
-    try:
+        readfd = writefd = readfd1 = writefd1 = readfd2 = writefd2 = None
+        eq = command_chan_recv = command_chan = None
 
         # Send an fd for the remote to write events to
         readfd, writefd = os.pipe()