Add error handling for Azure Exceptions (#177)

* Add error handling for Azure Exceptions

* Add SRGen for string

* Add specific exception messages

* Move DefinitionResult class

* Add SqlLogin constant

* Add error scenarios

* revert timeout duration

* Modify tests

* Modify tests

* Add tests

* Revert live connection definition

* Modify DefinitionsHandlerWithNoConnectionTest

* fix test after merge

* Code review changes

* Code review changes

* Code review changes

src/Microsoft.SqlTools.ServiceLayer/sr.resx

@@ -308,6 +308,32 @@
     <value>Could not retrieve column schema for result set</value>
     <comment></comment>
   </data>
+  <data name="PeekDefinitionAzureError" xml:space="preserve">
+    <value>This feature is currently not supported on Azure SQL DB and Data Warehouse: {0}</value>
+    <comment>.
+ Parameters: 0 - errorMessage (string) </comment>
+  </data>
+  <data name="PeekDefinitionError" xml:space="preserve">
+    <value>An unexpected error occurred during Peek Definition execution: {0}</value>
+    <comment>.
+ Parameters: 0 - errorMessage (string) </comment>
+  </data>
+  <data name="PeekDefinitionNoResultsError" xml:space="preserve">
+    <value>No results were found.</value>
+    <comment></comment>
+  </data>
+  <data name="PeekDefinitionNotConnectedError" xml:space="preserve">
+    <value>Please connect to a server.</value>
+    <comment></comment>
+  </data>
+  <data name="PeekDefinitionTimedoutError" xml:space="preserve">
+    <value>Operation timed out.</value>
+    <comment></comment>
+  </data>
+  <data name="PeekDefinitionTypeNotSupportedError" xml:space="preserve">
+    <value>This object type is currently not supported by this feature.</value>
+    <comment></comment>
+  </data>
   <data name="WorkspaceServicePositionLineOutOfRange" xml:space="preserve">
     <value>Position is outside of file line range</value>
     <comment></comment>