Fixing BuildManager in order not to create a system:image-puller role for the authenticated users when the master and build namespaces are set to the same value

[fabiobrz]

Fix #536

Tests passed locally.

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[mnovak1]

LGTM, however we'll need some comparing CI runs with same and different namespaces.

[fabiobrz]

LGTM, however we'll need some comparing CI runs with same and different namespaces.

Thanks @mnovak1 - I'll try to collect and share some link to upstream runs in here.

[mnovak1]

@fabiobrz do we have a passing ci run?

[fabiobrz]

@fabiobrz do we have a passing ci run?

HI @mnovak1 - I released a XTF snapshot containing the fix, and submitted a couple of Intersmash PRs to check it, one uses the same name for both the namespaces [1], and one is changing the one for the build namespace [2].
Let me know whether anything else is needed.

[1]
Intersmash/intersmash#44

[2]
Intersmash/intersmash#43

[mnovak1]

LGTM, merging