phosphor-snmp: use python3

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I31caf402b05e7e5d69ffe3c66bae86ff3976b1be
diff --git a/recipes-phosphor/network/phosphor-snmp_git.bb b/recipes-phosphor/network/phosphor-snmp_git.bb
index 7f4787b..71dc00f 100644
--- a/recipes-phosphor/network/phosphor-snmp_git.bb
+++ b/recipes-phosphor/network/phosphor-snmp_git.bb
@@ -5,7 +5,7 @@
 PV = "0.1+git${SRCPV}"
 
 inherit autotools pkgconfig
-inherit pythonnative
+inherit python3native
 inherit obmc-phosphor-dbus-service
 
 LICENSE = "Apache-2.0"