Update profile module version

Author: pandawang1123

src/ResourceManager/Billing/AzureRM.Billing.psd1

@@ -51,7 +51,7 @@ CLRVersion = '4.0'
 # ProcessorArchitecture = ''
 
 # Modules that must be imported into the global environment prior to importing this module
-RequiredModules = @(@{ModuleName = 'AzureRM.Profile'; ModuleVersion = '2.5.0'; })
+RequiredModules = @(@{ModuleName = 'AzureRM.Profile'; ModuleVersion = '2.6.0'; })
 
 # Assemblies that must be loaded prior to importing this module
 # RequiredAssemblies = @()