use Standard_B2s as baseline SKU for test clusters (#5083)

examples/e2e-tests/kubernetes/release/default/definition-no-vnet.json

@@ -20,7 +20,7 @@
         "masterProfile": {
             "count": 3,
             "dnsPrefix": "",
-            "vmSize": "Standard_D2_v3",
+            "vmSize": "Standard_B2s",
             "OSDiskSizeGB": 200,
             "availabilityZones": [
                 "1",
@@ -31,7 +31,7 @@
             {
                 "name": "poollinux",
                 "count": 1,
-                "vmSize": "Standard_D2_v3",
+                "vmSize": "Standard_B2s",
                 "OSDiskSizeGB": 200,
                 "storageProfile": "ManagedDisks",
                 "diskSizesGB": [
@@ -60,7 +60,7 @@
             {
                 "name": "pool1804",
                 "count": 1,
-                "vmSize": "Standard_D2_v3",
+                "vmSize": "Standard_B2s",
                 "distro": "ubuntu-18.04",
                 "availabilityProfile": "VirtualMachineScaleSets",
                 "availabilityZones": [

examples/e2e-tests/kubernetes/release/default/definition.json

@@ -21,7 +21,7 @@
     "masterProfile": {
       "count": 3,
       "dnsPrefix": "",
-      "vmSize": "Standard_D2_v3",
+      "vmSize": "Standard_B2s",
       "OSDiskSizeGB": 200,
       "vnetSubnetId": "/subscriptions/SUB_ID/resourceGroups/RG_NAME/providers/Microsoft.Network/virtualNetworks/VNET_NAME/subnets/SUBNET_NAME",
       "firstConsecutiveStaticIP": "10.239.255.239",
@@ -35,7 +35,7 @@
       {
         "name": "poollinux",
         "count": 1,
-        "vmSize": "Standard_D2_v3",
+        "vmSize": "Standard_B2s",
         "OSDiskSizeGB": 200,
         "storageProfile": "ManagedDisks",
         "diskSizesGB": [
@@ -66,7 +66,7 @@
       {
         "name": "pool1804",
         "count": 1,
-        "vmSize": "Standard_D2_v3",
+        "vmSize": "Standard_B2s",
         "distro": "ubuntu-18.04",
         "availabilityProfile": "VirtualMachineScaleSets",
         "vnetSubnetId": "/subscriptions/SUB_ID/resourceGroups/RG_NAME/providers/Microsoft.Network/virtualNetworks/VNET_NAME/subnets/SUBNET_NAME",

examples/kubernetes-gpu/kubernetes.json

@@ -4,13 +4,13 @@
     "masterProfile": {
       "count": 1,
       "dnsPrefix": "",
-      "vmSize": "Standard_D2_v3"
+      "vmSize": "Standard_B2s"
     },
     "agentPoolProfiles": [
       {
         "name": "pool1",
         "count": 1,
-        "vmSize": "Standard_D2_v3"
+        "vmSize": "Standard_B2s"
       },
       {
         "name": "poolgpu",