fix(templates): move templates directory under meta-belden-coreos

OpenEmbedded now include a checks that the template directory is
inside a subdirectory of the conf/templates directory of a layer.

This prevent the build from failing with "Error: TEMPLATECONF
value (which is coreos/templates) must point to
meta-some-layer/conf/templates/template-name" when sourcing
coreos-init-buildenv with OE-Core Master.

coreos-init-build-env

@@ -27,7 +27,7 @@ COREOS_ROOT=$(readlink -f "${COREOS_ROOT}")
 # All theses values can be overriden by the caller of coreos-init-build-env
 BITBAKEDIR="${BITBAKEDIR:-${COREOS_ROOT}/bitbake}"
 OEROOT="${OEROOT:-${COREOS_ROOT}/external-layers/openembedded-core}"
-TEMPLATECONF="${TEMPLATECONF:-${COREOS_ROOT}/templates}"
+TEMPLATECONF="${TEMPLATECONF:-${COREOS_ROOT}/layers/meta-belden-coreos/conf/templates/default}"
 
 # Sanity checks
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