[TRAVIS] Get a list of installed postgresql packages

git-svn-id: http://svn.osgeo.org/postgis/trunk@12841 b70326c6-7e19-0410-871a-916f4a2858ee
[TRAVIS] remove postgresql 9.2 and 9.3

Hopefully fixes confusion between library and header used

git-svn-id: http://svn.osgeo.org/postgis/trunk@12842 b70326c6-7e19-0410-871a-916f4a2858ee
[TRAVIS] Remove more postgresql item not in the 9.1 series

git-svn-id: http://svn.osgeo.org/postgis/trunk@12843 b70326c6-7e19-0410-871a-916f4a2858ee
[TRAVIS] Ensure to install also the 9.1 server, needed for regress

git-svn-id: http://svn.osgeo.org/postgis/trunk@12844 b70326c6-7e19-0410-871a-916f4a2858ee
[TRAVIS] Do not remove postresql-common

git-svn-id: http://svn.osgeo.org/postgis/trunk@12845 b70326c6-7e19-0410-871a-916f4a2858ee
Stub lwout_vt.c