Invalid log folder directory if colon in database server name

[erikbra]

If the server name includes e.g. tcp: (which is perfectly valid), RoundhousE crashes because it tries to use the colon in the log folder, which is not allowed on windows.

Example run:

 Running RoundhousE v1.0.2.0 against tcp:servername.database.windows.net,1433 - Databasename.
 Looking in ..\db\Databasename for scripts to run.
 Please press enter when ready to kick...
 The directory name is invalid : 'F:\ba1\temp\buildTmp\logs\migrations\Databasename\tcp:servername.database.windows\20181212_081338_1527'
 System.IO.IOException: The directory name is invalid : 'F:\ba1\temp\buildTmp\logs\migrations\Databasename\tcp:servername.database.windows\20181212_081338_1527'
  at System.IO.FileSystem.CreateDirectory(String fullPath)
  at System.IO.Directory.CreateDirectory(String path)
  at roundhouse.infrastructure.filesystem.DotNetFileSystemAccess.create_directory(String directory) in C:\projects\roundhouse\product\roundhouse\infrastructure\filesystem\DotNetFileSystemAccess.cs:line 341
  at roundhouse.runners.RoundhouseMigrationRunner.create_change_drop_folder() in C:\projects\roundhouse\product\roundhouse\runners\RoundhouseMigrationRunner.cs:line 262
  at roundhouse.runners.RoundhouseMigrationRunner.run() in C:\projects\roundhouse\product\roundhouse\runners\RoundhouseMigrationRunner.cs:line 85
  at roundhouse.console.Program.run_migrator(ConfigurationPropertyHolder configuration) in C:\projects\roundhouse\product\roundhouse.console\Program.cs:line 558
  at roundhouse.console.Program.Main(String[] args) in C:\projects\roundhouse\product\roundhouse.console\Program.cs:line 65

[erikbra]

Fixed in #356