Update default value for derive params workflow inputs

This change is to update the default value for derive params
workflow inputs num_phy_cores_per_numa_node_for_pmd
and huge_page_allocation_percentage.
num_phy_cores_per_numa_node_for_pmd default value needs to be reduced
to 1 and cannot use more than 1 because of multi-queues.
huge_page_allocation_percentage default value needs to be reduced
from 90 because in some cases where we do not have enough memory
for some hosts

Change-Id: I8620f07f09337d0d63198c3168fec00f16262a63
Closes-Bug: #1736713

plan-samples/plan-environment-derived-params.yaml

@@ -13,11 +13,11 @@ workflow_parameters:
     # PMD threads. The actual allocation will be based on network config, if
     # the a DPDK port is associated with a numa node, then this configuration
     # will be used, else 1.
-    num_phy_cores_per_numa_node_for_pmd: 2
+    num_phy_cores_per_numa_node_for_pmd: 1
     # Amount of memory to be configured as huge pages in percentage. Ouf the
     # total available memory (excluding the NovaReservedHostMemory), the
     # specified percentage of the remaining is configured as huge pages.
-    huge_page_allocation_percentage: 90
+    huge_page_allocation_percentage: 50
     ######### HCI Parameters #########
     hci_profile: default
     hci_profile_config: