1020539: Show proxy info if no RHN in firstboot

Previously, we used the http proxy info collected
in the RHN firstboot screens. If we are standalone
without those modules, show our proxy screen instead.
1030604: Handle 400 code for add override

Print message and return a less severe error code (1)
Merge pull request #836 from candlepin/mstead/1030604-add-override-handles-400-with-less-severe-code

1030604: Handle 400 code for add override
Merge pull request #823 from candlepin/alikins/1020539_show_proxy_in_standalone

1020539: Show proxy info if no RHN in firstboot
Fix stylish issues (tabs)
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Merge pull request #838 from candlepin/alikins/fix_make_stylish

Fix stylish issues (tabs)
Automatic commit of package [subscription-manager] release [1.10.8-1].
move the proxy information to python-rhsm
Merge branch 'master' into newproxypass