Bug 10577

When running bitbake on a Poky master HEAD of today, the host distro Centos 7.2.1511 is not recognised as a tested host distribution.

This contradicts the information at http://www.yoctoproject.org/docs/{latest,2.2}/ref-manual/ref-manual.html#detailed-supported-distros and the following list in meta-poky/conf/distro/poky.conf:

SANITY_TESTED_DISTROS ?= " \
            poky-1.8 \n \
            poky-2.0 \n \
            poky-2.1 \n \
            poky-2.2 \n \
            Ubuntu-14.04 \n \
            Ubuntu-14.10 \n \
            Ubuntu-15.04 \n \
            Ubuntu-15.10 \n \
            Ubuntu-16.04 \n \
            Fedora-22 \n \
            Fedora-23 \n \
            Fedora-24 \n \
            CentOSLinux-7.* \n \
            Debian-8.* \n \
            openSUSE-13.2 \n \
            SUSELINUX-42.1 \n \
            "

Please fix, as it might be confusing to novice users.

As a side note, it could be added as a comment that the test can be disabled by setting the variable to empty (text based upon CONNECTIVITY_CHECK_URI comment):

# The SANITY_TESTED_DISTROS list is used to compare the host distro against
# to determine whether this distro was tested successfully. To disable the test, 
# set the variable to be empty.

(note that "successfully" was misspelled in the CONNECTIVITY_CHECK_URI comment)