[BISERVER-10988] Error during the instaview publish when the project nam...

...e contains a space

	- IPlatformImporter offers a getHandlers() method (implemented at PentahoPlatformImporter)
	- RepositoryFileImportFileHandler now implements a getter method for the mimeTypeMap attribute
	- SolutionImportHandler encapsulates the builder.build() in a method of its own; the same for scheduler.createJob()