[backport][ses6] osd/replace: only access metadata if present

[jschmid1]

When a OSD is not actively deployed anymore but is still present in the crushmap you want to be able to replace it. This patch extends the condition for such a case.

Signed-off-by: Joshua Schmid jschmid@suse.de (cherry picked from commit 1ea490ebb849caf4fb3679380dc0511347ac7522)

backport of #1807

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Checklist:

• [ ] Added unittests and or functional tests
• [ ] Adapted documentation
• [ ] Referenced issues or internal bugtracker
• [ ] Ran integration tests successfully (trigger with "@susebot run teuthology" in a GitHub comment; see the wiki for more information)

[jschmid1]

@susebot run teuthology

[susebot]

Commit 61db416e94111fa96efb494033ae37b5d79b192b is NOT OK for suite deepsea:tier2. Check tests results in the Jenkins job: http://ci.ses.suse.de:8080/job/pr-deepsea/386/

[jschmid1]

@susebot run teuthology

[susebot]

Commit 61db416e94111fa96efb494033ae37b5d79b192b is OK for suite deepsea:tier2. Check tests results in the Jenkins job: http://ci.ses.suse.de:8080/job/pr-deepsea/387/