Move powsybl-mpi to powsybl-hpc repository (#858)

- Remove mpi-communication and jni-util modules
- Remove powsybl-computation-mpi
- Remove CMake files
- Adapt itools-packager
- Fix itools scripts and configuration
- Fix Readme.md

Signed-off-by: Mathieu BAGUE <[email protected]>

.gitignore

@@ -33,8 +33,6 @@
 /cim1/target/
 /commons/target/
 /computation-local/target/
-/computation-mpi/target/
-/computation-mpi-util/target/
 /computation/target/
 /contingency/target/
 /contingency/contingency-api/target/
@@ -78,10 +76,6 @@
 /ucte/ucte-network/target/
 /ucte/target/
 
-# CMake projects
-/build/
-/thirdparty/build/
-
 # IntelliJ
 /.idea
 *.iml