Fix Reload Pending Bug

[lsjordan]

Address a bug where the --reload flag doesnt work, unless used at the same time as the --upgrade flag, due to the reload pending exception.

swupgrade.py --host 10.123.21.11 --user *** --copy --upgrade
Password:
[SUCCESS] - 10.123.21.11: [C2960+][lanlite][15.0(2)SE6] - upgrade to 15.2(4)E7 - file already on flash
[INFO] - [MAIN]: 10.123.21.11 - Preparing to upgrade...
[SUCCESS] - [MAIN]: 10.123.21.11 - Upgrade success

swupgrade.py --host 10.123.21.11 --user *** --copy --upgrade --reload
Password:
[ERROR] - 10.123.21.11: Not supported - RELOAD PENDING

swupgrade.py --host 10.123.21.11 --user *** --copy --upgrade --reload
Password:
[SUCCESS] - 10.123.21.11: [C2960+][lanlite][15.0(2)SE6] - upgrade to 15.2(4)E7 - file already on flash
[INFO] - [MAIN]: 10.123.21.11 - Preparing to upgrade...
[SUCCESS] - [MAIN]: 10.123.21.11 - Upgrade success
[INFO] - [MAIN]: 10.123.21.11 - Preparing to reload...
[SUCCESS] - [MAIN]: 10.123.21.11 - Reload success, reloading in 5 mins