[ironic] Moving Aija to core-emeritus

Hi all,

As many of you may already know, Aija is no longer actively working on OpenStack. She informed many Ironic cores over email of this last week. I asked her if she expected to contribute on her own time and she said no.

In order to ensure we keep core reviewer lists up to date, I suggest we move Aija to core-emeritus status, removing core permissions from gerrit. If she decides to begin working on OpenStack again in the future, we'd obviously quickly return core permissions.

What do you think?

-- Jay Faulkner Ironic PTL TC Member

P.S. A huge thanks to Aija for her hard work on the sushy project and the Dell driver in Ironic.