#196580 Broken code model in Subprojects sample

Description of the bug (including IZ #)
#196580 -  Broken code model in Subprojects sample

Impact assessment i.e. why it is a showstopper?
- code model is a base functionality of IDE

Risk assessment i.e. why is it safe?
- it's a fix of regression comparing to 6.9.1

Confirmation of peer code review and QE verification of fix
- Alexander Simon reviewed fix, Alexander Pepin verified

Changeset info (for reviewing diffs)

http://hg.netbeans.org/cnd-main?cmd=changeset;node=111944bdc605
http://hg.netbeans.org/cnd-main?cmd=changeset;node=e540189c1124
http://hg.netbeans.org/cnd-main?cmd=changeset;node=dd0b4bba8743
http://hg.netbeans.org/cnd-main?cmd=changeset;node=4a8b54940d89


Thanks,
Vladimir.