needle tweaks for eurlatgr font in anaconda

Summary:
I discovered another fun font issue today. Current anaconda
images don't use the intended 'default' console font, eurlatgr.
Neither do live images, but installed systems *do*.

The font they use is the system BIOS font, which in openQA
cases means the qemu firmware font. The easiest way to spot the
difference is the @ character; the shorter version is from the
system BIOS, the slightly taller one is what it looks like in
eurlatgr and latarcyrheb-sun16 (the old default).

In a test image I built, for some reason, I *did* get eurlatgr
in the tmux console, and that broke some needle matches. After
figuring all this out, bcl has sent a lorax patch to use
eurlatgr in the installer, so it makes sense to add these fixes
to the repo for when that kicks in.

We shrink the match on root_logged_in.json by one line. This
screenshot is taken from a post-install case where the prompt
appears in the middle of the screen, and has three black rows
above the prompt; in anaconda, when the prompt appears right at
the top of the screen, there's only *two* rows of black above
it, so the match fails. This fixes that. It's been working so
far because installs have been matching root_logged_in_
rawhide20150311, which is taken with the firmware font, but
once the installer starts using eurlatgr, that won't match any
more.

We also add a new needle for the anaconda_install_source_check
_repo_added tag, taken with eurlatgr. The existing screenshot
was taken either with the firmware font or with latarcyrheb.
They both use a curly glyph for a single quote ('), while
eurlatgr uses a straight line.

This also renames the root_logged_in variant needle to be
clearer about why it's there. We'll probably need variants of
some needles until we're sure lives, anaconda env, and installed
systems are all using eurlatgr. RHBZ #1250262 is a bug I filed
for the live images not using eurlatgr.

Test Plan:
Run the tests with both BIOS font and eurlatgr as
the anaconda font and make sure they all work. The latter
might be a bit tricky till the change lands upstream, I've no
idea how it worked out that way in my test boot.iso.

Reviewers: jskladan, garretraziel

Reviewed By: garretraziel

Subscribers: tflink

Differential Revision: https://phab.qadevel.cloud.fedoraproject.org/D483

needles/anaconda_install_source_check_repo_added_eurlatgr.json

@@ -0,0 +1,18 @@
+{
+  "tags": [
+    "anaconda_install_source_check_repo_added",
+    "ENV-DISTRI-fedora",
+    "ENV-INSTLANG-en_US",
+    "ENV-OFW-1",
+    "ENV-FLAVOR-server"
+  ],
+  "area": [
+    {
+      "ypos": 17,
+      "height": 14,
+      "xpos": 102,
+      "type": "match",
+      "width": 304
+    }
+  ]
+}

needles/root_logged_in.json

@@ -1,11 +1,11 @@
 {
     "area": [
         {
-            "height": 17,
+            "height": 16,
             "type": "match",
             "width": 40,
             "xpos": 7,
-            "ypos": 111
+            "ypos": 112
         },
         {
             "height": 14,