ENT-4242 Upgrade Postgres version in migration scripts to Postgres 10

Now we will require DB migration when upgrading from all CFEngine versions,
including 3.12.x

Author: Aleksei Shpakovskii

packaging/common/cfengine-hub/postinstall.sh

@@ -376,7 +376,7 @@ generate_new_postgres_conf() {
 }
 
 #POSTGRES RELATED
-BACKUP_DIR=$PREFIX/backup-before-postgres10-migration
+BACKUP_DIR=$PREFIX/backup-before-postgres11-migration
 if [ ! -d $PREFIX/state/pg/data ]; then
   mkdir -p $PREFIX/state/pg/data
   chown -R cfpostgres $PREFIX/state/pg

packaging/common/cfengine-hub/preinstall.sh

@@ -15,10 +15,10 @@ if is_upgrade; then
     fi
 fi
 
-BACKUP_DIR=$PREFIX/backup-before-postgres10-migration
+BACKUP_DIR=$PREFIX/backup-before-postgres11-migration
 
-# If upgrading from a version below 3.12 that has PostgreSQL, and the data dir exists.
-if is_upgrade && egrep '^3\.([6-9]|1[01])\.' "$PREFIX/UPGRADED_FROM.txt" >/dev/null && [ -d "$PREFIX/state/pg/data" ]; then
+# If upgrading from a version below 3.13 that has PostgreSQL, and the data dir exists.
+if is_upgrade && egrep '^3\.([6-9]|1[012])\.' "$PREFIX/UPGRADED_FROM.txt" >/dev/null && [ -d "$PREFIX/state/pg/data" ]; then
   if [ -d "$BACKUP_DIR/data" ]; then
     cf_console echo "Old backup in $BACKUP_DIR already exists. Please remove before attempting upgrade."
     exit 1