Fix SW install bug for issue #1368

[sjtiantang]

proposed bug fix for issue: #1368

[chidanandpujar]

Fix works fine

root@masterhost:~# cat sw_install.py 
from jnpr.junos import Device
from xml.etree import ElementTree as etree
from pprint import pprint
from jnpr.junos.utils.sw import SW
#import logging
#logging.basicConfig( level=logging.DEBUG)
 
dev = Device(host='xyz', user='xyz', password='xyz', gather_facts=False, port=22, huge_tree=True)
dev.open()
 
def myprogress(dev, report):
        print("host: {}, report: {}".format( dev.hostname, report))
pkg = "xyz.tgz"
sw = SW(dev)
ok, msg = sw.install(package=pkg,
                     validate=False,
                     remote_path='/var/tmp',
                     progress=myprogress,
                     no_copy=True,
                     force_host=False,
                     reboot=False,
                     issu=False,
                     nssu = False,
                     cleanfs=False,
                     vmhost=False,
                     force_copy=False,
                     timeout=8000)
if ok:
   #sw.reboot()
   print("Pass")

<partial logs attached for referrence>

root@masterhost:~# vi sw_install.py 
root@masterhost:~# python3 sw_install.py 
host: systest-ex43mp-p1c-02, report: request-package-checks-pending-install rpc is not supported on given device
host: systest-ex43mp-p1c-02, report: validating software against current config, please be patient ...
host: systest-ex43mp-p1c-02, report: installing software on VC member: 1 ... please be patient ...
host: systest-ex43mp-p1c-02, report: software pkgadd package-result: 0
Output: 

[Mar 28 02:51:10]: Checking pending install on fpc1

Host OS upgrade staged. Reboot the system to complete installation!

Install completed
host: systest-ex43mp-p1c-02, report: installing software on VC member: 2 ... please be patient ...
host: systest-ex43mp-p1c-02, report: software pkgadd package-result: 0
Output: 

[Mar 28 03:00:49]: Checking pending install on fpc2


Host OS upgrade staged. Reboot the system to complete installation!

Install completed
host: systest-ex43mp-p1c-02, report: installing software on VC member: 0 ... please be patient ...
host: systest-ex43mp-p1c-02, report: software pkgadd package-result: 0

Host OS upgrade staged. Reboot the system to complete installation!

Install completed

Pass