Fixes migration to 2.0 path errors

Genesis 2.8 modified how the `bosh` helper function which changes the
current path context.  Because it now uses the genesis repo path,
relative paths such as files in the kit need to be referenced fully.

Also bump min genesis version to 2.7.23 because of limitation on using
rc min versions.

hooks/migrate-to-2.0

@@ -3,13 +3,15 @@
 migrate_credentials_to_credhub() {
   vault_prefix=${GENESIS_SECRETS_MOUNT}${GENESIS_SECRETS_SLUG}
   vault_paths=$(safe paths --keys ${vault_prefix} | jq -c -R -s 'split("\n") | map(select(length > 0))')
+  [[ -n "$GENESIS_KIT_PATH" ]] || export GENESIS_KIT_PATH="$PWD"
+  [[ -n "$GENESIS_BOSH_COMMAND" ]] || export GENESIS_BOSH_COMMAND=`type -P bosh bosh2 bosh-cli | head -n1`
   credhub import -f <( \
-    bosh int ./hooks/support/vault-credhub-mapping.yml \
-    -v=credhub_prefix=$GENESIS_CREDHUB_ROOT -v=vault_prefix=${vault_prefix#/} | spruce json \
+    $GENESIS_BOSH_COMMAND int "${GENESIS_KIT_PATH}/hooks/support/vault-credhub-mapping.yml" \
+    -v=credhub_prefix="$GENESIS_CREDHUB_ROOT" -v=vault_prefix=${vault_prefix#/} | spruce json \
     | jq --argjson paths $vault_paths '.credentials  | map(select(.value | try .private_key // . | split("\"")[1] | IN($paths[]))) | {credentials: .}' \
     | spruce merge )
 
-  external_db_user=$(credhub get -n ${GENESIS_CREDHUB_ROOT}/external_db_user -j 2>/dev/null | jq -r '.value')
+  external_db_user=$(credhub get -n "${GENESIS_CREDHUB_ROOT}/external_db_user" -j 2>/dev/null | jq -r '.value')
   if [[ ${external_db_user} != "" ]] ; then
     describe >&2 "#Y{{WARNING}} You must set params.external_db_user to '((external_db_user))' "\
       "in your #C{$GENESIS_ENVIRONMENT.yml} to use the username that was located in vault"

kit.yml

@@ -16,5 +16,5 @@ required_configs:
   - cloud
   - runtime
 
-genesis_version_min: 2.7.23-rc1
+genesis_version_min: 2.7.23
 secrets_store: credhub