Change wants to requires for all critical services

In order for targets to fail when their services fail,
the relationship must be a "requires"

Change-Id: I1523dd51af8817b473557bac65e9e71eacecf52e
Signed-off-by: Andrew Geissler <andrewg@us.ibm.com>
diff --git a/common/recipes-phosphor/chassis/obmc-watchdog.bb b/common/recipes-phosphor/chassis/obmc-watchdog.bb
index 5586903..77017e3 100644
--- a/common/recipes-phosphor/chassis/obmc-watchdog.bb
+++ b/common/recipes-phosphor/chassis/obmc-watchdog.bb
@@ -14,12 +14,12 @@
 START_TMPL = "obmc-start-watchdog@.service"
 START_TGTFMT = "obmc-chassis-start@{1}.target"
 START_INSTFMT = "obmc-start-watchdog@{0}.service"
-START_FMT = "../${START_TMPL}:${START_TGTFMT}.wants/${START_INSTFMT}"
+START_FMT = "../${START_TMPL}:${START_TGTFMT}.requires/${START_INSTFMT}"
 
 STOP_TMPL = "obmc-stop-watchdog@.service"
 STOP_TGTFMT = "obmc-chassis-stop@{1}.target"
 STOP_INSTFMT = "obmc-stop-watchdog@{0}.service"
-STOP_FMT = "../${STOP_TMPL}:${STOP_TGTFMT}.wants/${STOP_INSTFMT}"
+STOP_FMT = "../${STOP_TMPL}:${STOP_TGTFMT}.requires/${STOP_INSTFMT}"
 
 SYSTEMD_LINK_${PN} += "${@compose_list_zip(d, 'START_FMT', 'OBMC_WATCHDOG_INSTANCES', 'OBMC_CHASSIS_INSTANCES')}"
 SYSTEMD_LINK_${PN} += "${@compose_list_zip(d, 'STOP_FMT', 'OBMC_WATCHDOG_INSTANCES', 'OBMC_CHASSIS_INSTANCES')}"