debuginfo-install: fix installing when installed version not found in repos, optimize performance (RhBug: 1108321)

[ignatenkobrain]

https://bugzilla.redhat.com/show_bug.cgi?id=1108321

[akozumpl]

I can see quite a few lint messages against debuginfo-install.py, many of those appearing only after this patch:

************* Module debuginfo-install
W0511: debuginfo-install:132,0: FIXME:
C0301: debuginfo-install:  2,0: Line too long (89/82)
C0301: debuginfo-install:133,0: Line too long (87/82)
C0301: debuginfo-install:136,0: Line too long (106/82)
C0301: debuginfo-install:137,0: Line too long (91/82)
C0103: debuginfo-install:  1,0: Invalid module name "debuginfo-install"
C0103: debuginfo-install: 68,4: Invalid argument name "p"
C0103: debuginfo-install: 94,4: Invalid argument name "po"
C0103: debuginfo-install: 94,4: Invalid argument name "r"
W0201: debuginfo-install: 59,8: Attribute 'packages_available' defined outside __init__
W0201: debuginfo-install: 60,8: Attribute 'packages_installed' defined outside __init__
W0201: debuginfo-install: 58,8: Attribute 'packages' defined outside __init__
W0201: debuginfo-install: 56,8: Attribute 'done' defined outside __init__
W0201: debuginfo-install: 57,8: Attribute 'rejected' defined outside __init__

Can you please fix those together with this rather large change? To run the pylint locally, use the ./scripts/lint <file.py>.

[akozumpl]

Igor, I think I've missed your updated version. Is this still supposed to be merged?

[ignatenkobrain]

Yes. This fixes some bugs and improves performance.

[akozumpl]

merged now, thanks