Database Manager

done:
+ master.sql as resource
+ implemented incremental database changes also for Master
+ dbUp sql script variables implemented
+ improved database handling and creation code
+ simpified database creation
+ almost all Database and Tenant creation moved to DatabaseManager.cs (rest code marked with TODO)
+ Unattended install of master can be performed by settings in appsettings.json
+ Improved IsInstalled checking
+ Removed DBSchema field from Tenant
+ Default database and site creation moved to Program.Main

Oqtane.Client/Modules/Admin/Tenants/Edit.razor

@@ -20,14 +20,7 @@
             <input class="form-control" @bind="@connectionstring" />
         </td>
     </tr>
-    <tr>
-        <td>
-            <label  class="control-label">Schema: </label>
-        </td>
-        <td>
-            <input class="form-control" @bind="@schema" />
-        </td>
-    </tr>
+
 </table>
 <button type="button" class="btn btn-success" @onclick="SaveTenant">Save</button>
 <NavLink class="btn btn-secondary" href="@NavigateUrl()">Cancel</NavLink>
@@ -38,7 +31,6 @@
     int tenantid;
     string name = "";
     string connectionstring = "";
-    string schema = "";
 
     protected override async Task OnInitializedAsync()
     {
@@ -50,7 +42,6 @@
             {
                 name = tenant.Name;
                 connectionstring = tenant.DBConnectionString;
-                schema = tenant.DBSchema;
             }
         }
         catch (Exception ex)
@@ -70,7 +61,6 @@
             {
                 tenant.Name = name;
                 tenant.DBConnectionString = connectionstring;
-                tenant.DBSchema = schema;
                 await TenantService.UpdateTenantAsync(tenant);
                 await logger.LogInformation("Tenant Saved {TenantId}", tenantid);