fix echo pathing for ubuntu

Author: MartyEwings

tasks/reset_pgrepack_schema.sh

@@ -1,12 +1,12 @@
-#!/bin/sh
+#!/bin/bash
 
 # Puppet Task Name: reset_pgrepack_schema
 declare PT__installdir
 # shellcheck disable=SC1090
 source "$PT__installdir/pe_databases/files/common.sh"
 
 #Determine if PE Postgres is available
-if puppet resource service pe-postgresql | grep -q running; then
+if puppet resource service pe-postgresql | $(/usr/bin/which grep) -q running; then
     #Remove the pg_repack extension
     su - pe-postgres -s '/bin/bash' -c '/opt/puppetlabs/server/bin/psql -d pe-puppetdb -c "DROP EXTENSION pg_repack CASCADE"' || fail "unable to drop pg_repack extension"