Get Database Info (#370)

* added get database info to admin service

* refactored code to be inline with standard

* added comments to utils functions

* added comments to public classes

* removed camelcase from request type

* removed the wrapper for the generic dictionary

* removed unnecessary imports

src/Microsoft.SqlTools.ServiceLayer/Admin/AdminServicesProviderOptionsHelper.cs

@@ -31,6 +31,7 @@ namespace Microsoft.SqlTools.ServiceLayer.Admin
         internal const string MaxDop = "maxDop";
         internal const string DatabaseContainmentType = "databaseContainmentType";
         internal const string DatabaseState = "databaseState";
+        internal const string RecoveryModel = "recoveryModel";
         internal const string FileGroupType = "fileGroupType";
         internal const string IsDefault = "isDefault";
         internal const string IsFileStream = "isFileStream";
@@ -195,6 +196,15 @@ namespace Microsoft.SqlTools.ServiceLayer.Admin
                         GroupName = "Other"
                     },
                     new ServiceOption
+                    {
+                        Name = AdminServicesProviderOptionsHelper.RecoveryModel,
+                        DisplayName = "RecoveryModel",
+                        Description = "Recovery model",
+                        ValueType = ServiceOption.ValueTypeString,
+                        IsRequired = false,
+                        GroupName = "Other"
+                    },
+                    new ServiceOption
                     {
                         Name = AdminServicesProviderOptionsHelper.FileGroups,
                         DisplayName = "File Groups",