rename files from ceph-test package

The ceph-test package contains files which are installed to /usr/bin, but these files have names which don't give any hint that they are part of ceph.

Rename the files of the ceph-test package to indicate they belong to ceph. Prefix them with "ceph_". Update packaging files like RPM spec and debian files. Add some files which are present in ceph-test of the RPM spec file but not in ceph-test.install.

I hope I didn't oversee any reference/call of the changed files. If the change gets accepted maybe some other tools outside this git tree needs to be updated. Let me know which projects I need to update.

Update and cleanup .gitignore files.

incorporated comments from the ML.