Increase resources on gtw nodes for tempest

Change-Id: I1d8d803c34de7343a430d40881772aaf69c8e224
diff --git a/tcp_tests/templates/virtual-mcp-pike-ovs-ceph/underlay.yaml b/tcp_tests/templates/virtual-mcp-pike-ovs-ceph/underlay.yaml
index e6a0d1f..77e33a2 100644
--- a/tcp_tests/templates/virtual-mcp-pike-ovs-ceph/underlay.yaml
+++ b/tcp_tests/templates/virtual-mcp-pike-ovs-ceph/underlay.yaml
@@ -556,8 +556,8 @@
           - name: {{ HOSTNAME_GTW01 }}
             role: salt_minion
             params:
-              vcpu: !os_env SLAVE_NODE_CPU, 1
-              memory: !os_env SLAVE_NODE_MEMORY, 2048
+              vcpu: !os_env SLAVE_NODE_CPU, 4
+              memory: !os_env SLAVE_NODE_MEMORY, 4096
               boot:
                 - hd
               cloud_init_volume_name: iso