Fix miscellaneous F# build warning errors

Author: ccheetham

src/Content/NetCoreTool.Template.WebApi/FSharp/.template.config/template.json

@@ -326,6 +326,10 @@
       },
       "replaces": "$(MySqlDriverVersion)"
     },
+    "NeedsSelf": {
+      "type": "computed",
+      "value": "AnyConnector || CircuitBreakerHystrixOption || DiscoveryEurekaOption || (DistributedTracingOption && Steeltoe2) || HostingCloudFoundryOption || ManagementEndpointsOption"
+    },
     "NpgsqlDriverVersion": {
       "type": "generated",
       "generator": "constant",

src/Content/NetCoreTool.Template.WebApi/FSharp/Directory.Build.props

@@ -30,6 +30,7 @@
     <MongoDbDriverVersion>2.8.*</MongoDbDriverVersion>
     <MySqlDriverVersion>8.0.*</MySqlDriverVersion>
     <NpgsqlDriverVersion>4.1.*</NpgsqlDriverVersion>
+    <NeedsSelf>false</NeedsSelf>
     <RabbitMqDriverVersion>5.1.*</RabbitMqDriverVersion>
     <RedisDriverVersion>3.1.*</RedisDriverVersion>
     <SteeltoeVersionOption>3.1.*</SteeltoeVersionOption>