meta-openpower: openpower-occ-control:disable test

This test doesn't compile when I build the Romulus BMC. It's a
convention that we disable test in Yocto builds.

Tested: Yocto builds Romulus fine.

Signed-off-by: Nan Zhou <nanzhoumails@gmail.com>
Change-Id: Iba21b0a3275cf0037cb7793d063294070da35a41
diff --git a/meta-openpower/recipes-phosphor/occ/openpower-occ-control_git.bb b/meta-openpower/recipes-phosphor/occ/openpower-occ-control_git.bb
index c39c077..10d495b 100644
--- a/meta-openpower/recipes-phosphor/occ/openpower-occ-control_git.bb
+++ b/meta-openpower/recipes-phosphor/occ/openpower-occ-control_git.bb
@@ -42,6 +42,7 @@
 EXTRA_OEMESON = " \
              -Dyamldir=${STAGING_DATADIR_NATIVE}/${PN} \
              -Dps-derating-factor=${POWER_SUPPLY_DERATING_FACTOR} \
+             -Dtests=disabled \
              "
 EXTRA_OEMESON:append = "${@bb.utils.contains('MACHINE_FEATURES', 'i2c-occ', ' -Di2c-occ=enabled', '', d)}"