Add the possibility to import new Loans data

Łukasz, I found a bug.
By using import it is possible to Disburse Loan in the future what is wrong.

REPRO:

1. Set Disbursal Date as future date and set status as for example Active in good standing.

2. Import Loan

3. See imported account

4. See Disbursal Date

Actual Result:
It is possible to Disburse Loan in the future.

Expected Result:
It is not possible to Disburse Loan in the future. Validation message appears during import operation.

fixed in commit fea23efb86a614c2928191cf52dab8daf18bf80a

Łukasz, I found two more bugs:

When importing Loans without filling Customer Global ID column there is an error message: "globalCustNum cannot be null or empty.". This validation message should contains information in which row and column number problem exist.

Also there is a problem with "Disbursed to LO" status. Currently in Mifos it is not possible to give to Loan Account "Disbursed to LO" status. By using import and filling column "Status Name" with "Disbursed To Loan Officer", it is possible to create an account with this status.

fixed in commit 01b934a95844a1e2a9b764786355ca3b50b0b5d2

Now it is OK. Import of new Loans data works properly.
_{Build Date: Wed Aug 01 03:47:45 PDT 2012
Build Number: hudson-head-master-archive-989}