Move log to verbose for automatic excluded instrumented libs (#548)

Move log to verbose for automatic excluded instrumented libs

Author: MarcoRossignoli

src/coverlet.core/Instrumentation/Instrumenter.cs

@@ -76,7 +76,7 @@ public bool CanInstrument()
                         }
                         else
                         {
-                            _logger.LogWarning($"Unable to instrument module: {_module}, embedded pdb without local source files, [{firstNotFoundDocument}]");
+                            _logger.LogVerbose($"Unable to instrument module: {_module}, embedded pdb without local source files, [{firstNotFoundDocument}]");
                             return false;
                         }
                     }
@@ -88,7 +88,7 @@ public bool CanInstrument()
                         }
                         else
                         {
-                            _logger.LogWarning($"Unable to instrument module: {_module}, pdb without local source files, [{firstNotFoundDocument}]");
+                            _logger.LogVerbose($"Unable to instrument module: {_module}, pdb without local source files, [{firstNotFoundDocument}]");
                             return false;
                         }
                     }

test/coverlet.core.tests/Instrumentation/InstrumenterTests.cs

@@ -353,7 +353,7 @@ public void SkipEmbeddedPpdbWithoutLocalSource()
             Assert.True(_instrumentationHelper.HasPdb(xunitDll, out bool embedded));
             Assert.True(embedded);
             Assert.False(instrumenter.CanInstrument());
-            loggerMock.Verify(l => l.LogWarning(It.IsAny<string>()));
+            loggerMock.Verify(l => l.LogVerbose(It.IsAny<string>()));
 
             // Default case
             string coverletCoreDll = Directory.GetFiles(Directory.GetCurrentDirectory(), "coverlet.core.dll").First();
@@ -380,7 +380,7 @@ public void SkipPpdbWithoutLocalSource()
             Assert.True(_instrumentationHelper.HasPdb(coverletLib, out bool embedded));
             Assert.False(embedded);
             Assert.False(instrumenter.CanInstrument());
-            loggerMock.Verify(l => l.LogWarning(It.IsAny<string>()));
+            loggerMock.Verify(l => l.LogVerbose(It.IsAny<string>()));
         }
 
         [Fact]