When we have shape definition for commend, eg.:
   <v:shape id="_x0000_s1026" type="#_x0000_t202"

the "type" must be specified previously, eg:
    <v:shapetype id="shapetype_202" coordsize="21600,21600" o:spt="202" path="m,l,21600l21600,21600l21600,xe">
        <v:stroke joinstyle="miter"/>
        <v:path gradientshapeok="t" o:connecttype="rect"/>
    </v:shapetype

Unfortunately here is the problem, "id" of "v:shapetype" is "shapetype_202".
It means that type used by shape type="#_x0000_t202" is not exisiting.

To fix that issue I have changed "v:shapetype" id to be exactly the same as it is used:
    <v:shapetype id="_x005F_x0000_t202" coordsize="21600,21600" o:spt="202" path="m,l,21600l21600,21600l21600,xe">
        <v:stroke joinstyle="miter"/>
        <v:path gradientshapeok="t" o:connecttype="rect"/>
    </v:shapetype>

After that fix, comments are displayed correctly.
I also added unit test, to make sure that shape is using already defined "shapetype".

Change-Id: I8faf1befe7573aa33ee8a294eb192e5e255f37a1
Reviewed-on: https://gerrit.libreoffice.org/47821Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Bartosz Kosiorek <gang65@poczta.onet.pl>