disable Retrace Server analysis on openSUSE

Related to #181

Signed-off-by: Jakub Filak <jfilak@redhat.com>
configure: make openSUSE enabled by default

Because we want to able to run:

./autogen && ./configure && make dist

When openSUSE is disable we have to run

./autogen && ./configure --with-opensuse-support && make dist

Related to #181

Signed-off-by: Jakub Filak <jfilak@redhat.com>
spec: disable openSUSE support on non SUSE OS

Related to #181

Signed-off-by: Jakub Filak <jfilak@redhat.com>