Merge pull request #1633 from mdamour1976/5.1

[BISERVER-11745] Editing a blockout does not preserve the duration
[PDI-12413] Adding default for singleTenantAdminUserName in case one is not supplied.
[BISERVER-11722] Roles with special characters do not retain their Operation Permissions
Merge pull request #1636 from pminutillo/5.1

[BISERVER-11722] Roles with special characters do not retain their Opera...
[PDI-12418] - removed execute perms for power user as execute permission lifecycle manager adds the perms for power user backport 5.1
Merge pull request #1639 from pentaho-skarmali/5.1

[PDI-12418] - removed execute perms for power user as execute permission...
[BISERVER-11751] - IE: Couldn't upload files in Browse perspective
Merge pull request #1641 from jeffreythomas/5.1-dev

5.1 dev