Switch salt formulas to mirror.mirantis.com by default

Change-Id: I2f40bc6db6d30e20b9ca2d765a98aa72e4bd2d42
diff --git a/bootstrap.sh b/bootstrap.sh
index c59db0b..3d60781 100755
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -52,8 +52,8 @@
 test -e /etc/lsb-release && eval $(cat /etc/lsb-release)
 which lsb_release && DISTRIB_CODENAME=${DISTRIB_CODENAME:-$(lsb_release -cs)}
 #
-export APT_REPOSITORY=${APT_REPOSITORY:- deb [arch=amd64] http://apt.mirantis.com/${DISTRIB_CODENAME} ${DISTRIB_REVISION:-stable} salt}
-export APT_REPOSITORY_GPG=${APT_REPOSITORY_GPG:-http://apt.mirantis.com/public.gpg}
+export APT_REPOSITORY=${APT_REPOSITORY:- deb [arch=amd64] http://mirror.mirantis.com/${DISTRIB_REVISION:-stable}/salt-formulas/${DISTRIB_CODENAME} ${DISTRIB_CODENAME} main}
+export APT_REPOSITORY_GPG=${APT_REPOSITORY_GPG:-http://mirror.mirantis.com/${DISTRIB_REVISION:-stable}/salt-formulas/${DISTRIB_CODENAME}/archive-salt-formulas.key}
 # reclass
 export RECLASS_ADDRESS=${RECLASS_ADDRESS:-https://github.com/salt-formulas/openstack-salt.git} # https/git
 export RECLASS_BRANCH=${RECLASS_BRANCH:-master}
@@ -93,7 +93,7 @@
 BOOTSTRAP_SALTSTACK_VERSION=${BOOTSTRAP_SALTSTACK_VERSION//latest*/stable}
 # TODO add 'r' option by default
 # Currently, without 'r' option, upstream saltstack repos will be used. Otherwise
-# local one should be used, from http://apt.mirantis.com/ or whatever.
+# local one should be used, from http://mirror.mirantis.com/ or whatever.
 BOOTSTRAP_SALTSTACK_OPTS=${BOOTSTRAP_SALTSTACK_OPTS:- -dX $BOOTSTRAP_SALTSTACK_VERSION }
 SALT_SOURCE=${SALT_SOURCE:-pkg}