Adding EventSource to NetFx (dotnet#399)

* EventTrace for NetFx, changes made to SqlConnection

* EventSource for NetFx

* Adding IsTraceEnabled

* EventSource NetFx to Review

* Taking unused variable out

* Ignore on .NetCore

* Update EventSourceTest.cs

* Adding if blocks

* EventSource

* Documentation

* Adding Tests and documentation

* Fixing Tests issues in NetCore

* moving from Functional to Manual Tests

* EventSource

* EventSource unwanted reference

* Taking extra documentation file out.

* Deleting unwanted file from NetCore

* EventSource

* Additional Improvments

* Taking the Static reference out

* Removing Extra lines and unwanted SqlClient Reference from SqlClientEventSource

* Changing documentation and adding Advanced Keyword

* Adding Overloaded methods in EventSource

* Fixing test issues

* more fixes

* EventSource

* ActivityCorrelator added.

* ActivityCorrelator added.

* fixing AdvanceTraceOn issues

* StateDump

* Removing if statement from code and placing them inside EventSource

* integrating SqlEventSource to SqlClientEventSource

* Adding null value checker to SqlDependencyListener EventSource logger

* EventSource

* Fixing ScopeLeave related logic

* Fixing PR issues and Tests

* EventSource

* EventSource

* EventSource

* Removing Doc

* ExceptionTrace Fix

* Update SqlAuthenticationProviderManager.cs

* Update SqlBulkCopy.cs

* Update SqlConnectionFactory.cs

* Update SqlConnectionPoolGroupProviderInfo.cs

* Update SqlCommand.cs