Release Name: 1.8.1-patch4

*** gPM 1.8.1 - Patch 4 ***
    o Pre-requisites
        - gPM v1.8.1 deployed
        - Patch 1 of gPM v1.8.1 applied
        - Patch 2 of gPM v1.8.1 applied
        - Patch 3 of gPM v1.8.1 applied

    o Into the folder WEB-INF/lib
        - Replace the file 'gPM-services-business-1.8.1-p3.jar' by the one of the patch 'gPM-services-business-1.8.1-p4.jar'.

Fixed bugs :
    o DM 303
        - Problem on product with several environments.
    o Bug 97
        - Performance problem on sheet update with attached files.