sonic-vs.img.gz target build failure

[vganesan-nokia]

Description
Build fails for target sonic-vs.img.gz.

Steps to reproduce the issue:

1. Clone latest sonic-buildimage master (as of Oct 4, 2020)
2. make init
3. make configure PLATFORM=vs
4. make target/sonic-vs.img.gz

Describe the results you received:

The failure occurs during installation of sonic-utilities python 2 wheel, when sonic_debian_extension.sh is run as part of build_debian.sh. While downloading dependencies, the collection times out for dependent package xmltodict==0.12.0
Since the sonic-vs-img.gz is a big file, here the snap shot of the error is given

Setting up python-colorama (0.3.7-1) ...
Setting up python-click (7.0-1) ...
++ basename target/python-wheels/sonic_utilities-1.2-py2-none-any.whl
+ SONIC_UTILITIES_PY2_WHEEL_NAME=sonic_utilities-1.2-py2-none-any.whl
+ sudo cp target/python-wheels/sonic_utilities-1.2-py2-none-any.whl ./fsroot/sonic_utilities-1.2-py2-none-any.whl
+ sudo LANG=C chroot ./fsroot pip install sonic_utilities-1.2-py2-none-any.whl
Processing /sonic_utilities-1.2-py2-none-any.whl
Requirement already satisfied: sonic-py-common in /usr/local/lib/python2.7/dist-packages (from sonic-utilities==1.2) (1.0)
Requirement already satisfied: swsssdk>=2.0.1 in /usr/local/lib/python2.7/dist-packages (from sonic-utilities==1.2) (2.0.1)
Requirement already satisfied: ipaddress in /usr/local/lib/python2.7/dist-packages (from sonic-utilities==1.2) (1.0.23)
Requirement already satisfied: netifaces in /usr/local/lib/python2.7/dist-packages (from sonic-utilities==1.2) (0.10.7)
Requirement already satisfied: click in /usr/lib/python2.7/dist-packages (from sonic-utilities==1.2) (7.0)
Requirement already satisfied: sonic-yang-mgmt in /usr/local/lib/python2.7/dist-packages (from sonic-utilities==1.2) (1.0)
Requirement already satisfied: m2crypto in /usr/lib/python2.7/dist-packages (from sonic-utilities==1.2) (0.31.0)
Collecting xmltodict==0.12.0 (from sonic-utilities==1.2)
  Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<urllib3.connection.VerifiedHTTPSConnection object at 0x7f824ee3ff90>, 'Connection to pypi.org timed out. (connect timeout=15)')': /simple/xmltodict/
  Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<urllib3.connection.VerifiedHTTPSConnection object at 0x7f824ee3ff50>, 'Connection to pypi.org timed out. (connect timeout=15)')': /simple/xmltodict/
  Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<urllib3.connection.VerifiedHTTPSConnection object at 0x7f824ee3f990>, 'Connection to pypi.org timed out. (connect timeout=15)')': /simple/xmltodict/
  Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<urllib3.connection.VerifiedHTTPSConnection object at 0x7f824ee3ff10>, 'Connection to pypi.org timed out. (connect timeout=15)')': /simple/xmltodict/
  Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<urllib3.connection.VerifiedHTTPSConnection object at 0x7f824f49f150>, 'Connection to pypi.org timed out. (connect timeout=15)')': /simple/xmltodict/
  Could not find a version that satisfies the requirement xmltodict==0.12.0 (from sonic-utilities==1.2) (from versions: )
No matching distribution found for xmltodict==0.12.0 (from sonic-utilities==1.2)
+ clean_sys
+ sudo chroot ./fsroot umount /sys/fs/cgroup/blkio /sys/fs/cgroup/cpu /sys/fs/cgroup/cpu,cpuacct /sys/fs/cgroup/cpuacct /sys/fs/cgroup/cpuset /sys/fs/cgroup/devices /sys/fs/cgroup/freezer /sys/fs/cgroup/hugetlb /sys/fs/cgroup/memory /sys/fs/cgroup/net_cls /sys/fs/cgroup/net_cls,net_prio /sys/fs/cgroup/net_prio /sys/fs/cgroup/perf_event /sys/fs/cgroup/pids /sys/fs/cgroup/rdma /sys/fs/cgroup/systemd /sys/fs/cgroup /sys
umount: /sys/fs/cgroup/cpu: no mount point specified.
umount: /sys/fs/cgroup/cpu,cpuacct: no mount point specified.
umount: /sys/fs/cgroup/cpuacct: no mount point specified.
umount: /sys/fs/cgroup/net_cls: no mount point specified.
umount: /sys/fs/cgroup/net_cls,net_prio: no mount point specified.
umount: /sys/fs/cgroup/net_prio: no mount point specified.
umount: /sys/fs/cgroup/systemd: no mount point specified.
+ true
+ true
+ sudo LANG=C chroot ./fsroot umount /proc
+ true

Describe the results you expected:

The build should be successful and the target sonic-vs.img.gz should available under directory sonic-buildimage/target

Additional information you deem important (e.g. issue happens only occasionally):

**Output of `show version`:**

N/A

**Attach debug file `sudo generate_dump`:** 

N/A

[vganesan-nokia]

This is fixed by PR #5498