Fix the installation location of mon-collector
Fix the installation location of mon-collector

The mon-collector binary was erroneously installed twice: once in
/usr/bin/ and once in /usr/lib/ganeti/.
With this modification, it is now installed in /usr/lib/ganeti/ only,
as intended.

In order to do this in a proper way, some parts of the Makefile.am where
refactored.

Signed-off-by: Michele Tartara <05f7077a2c6cbbdc4af4ba42e3ef89a0df846179@google.com>
Reviewed-by: Guido Trotter <f62ca4d5358bdaeef0e50e57f9f7e231de63727e@google.com>

ganeti/ganeti,onponomarev/ganeti,apyrgio/snf-ganeti,andir/ganeti,yiannist/ganeti,leshchevds/ganeti,ganeti/ganeti,yiannist/ganeti,onponomarev/ganeti,ganeti-github-testing/ganeti-test-1,ganeti/ganeti,mbakke/ganeti,mbakke/ganeti,andir/ganeti,ganeti-github-testing/ganeti-test-1,grnet/snf-ganeti,andir/ganeti,dimara/ganeti,apyrgio/ganeti,leshchevds/ganeti,grnet/snf-ganeti,bitemyapp/ganeti,apyrgio/ganeti,leshchevds/ganeti,bitemyapp/ganeti,mbakke/ganeti,dimara/ganeti,yiannist/ganeti,apyrgio/snf-ganeti