Cleaned up a few warnings

Author: KevinHoward

src/ServiceStack.OrmLite.SqlServerTests/Expressions/AuthorUseCase.cs

@@ -304,7 +304,7 @@ public void AuthorUsesCases()
                     bool r6 = db.Scalar<Author, bool>(e => Sql.Max(e.Active));
                     Assert.AreEqual(expectedBool, r6);
                 }
-                catch (Exception e)
+                catch //(Exception e)
                 {
                     //????
                     //if (dialect.Name == "PostgreSQL")

src/ServiceStack.OrmLite.SqlServerTests/SchemaTests.cs

@@ -65,7 +65,7 @@ public void Can_replace_decimal_column()
             {
                 db.DropAndCreateTable<TestDecimalConverter>();
 
-                Assert.That(db.GetLastSql(), Is.StringContaining("FLOAT"));
+                Assert.That(db.GetLastSql(), Does.Contain("FLOAT"));
             }
         }
 

src/ServiceStack.OrmLite.SqlServerTests/SqlServerExpressionVisitorQueryTest.cs

@@ -13,7 +13,7 @@ namespace ServiceStack.OrmLite.SqlServerTests
     public class SqlServerExpressionVisitorQueryTest : OrmLiteTestBase
     {
         [OneTimeSetUp]
-        public void TestFixtureSetUp()
+        public override void TestFixtureSetUp()
         {
             OrmLiteConfig.SanitizeFieldNameForParamNameFn = s =>
                 (s ?? "").Replace(" ", "").Replace("°", "");