upgrade poi-ooxml to remove javax.xml.stream jars in dependencies (#2120)
upgrade poi-ooxml to remove javax.xml.stream jars in dependencies (#2120)

in eclipse we have the following error:
The package javax.xml.stream is accessible from more than one module: <unnamed>, java.xml

this is the minimal upgrade that removes transitive deps to the problematic jars:
stax-api.jar and xml-apis.jar have packages javax.xml.stream

[INFO] +- com.powsybl:powsybl-ucte-converter:jar:4.8.0:runtime
[INFO] |  +- com.powsybl:powsybl-entsoe-util:jar:4.8.0:compile
[INFO] |  |  \- org.apache.poi:poi-ooxml:jar:3.15:compile
[INFO] |  |     +- org.apache.poi:poi:jar:3.15:compile
[INFO] |  |     |  \- org.apache.commons:commons-collections4:jar:4.1:compile
[INFO] |  |     +- org.apache.poi:poi-ooxml-schemas:jar:3.15:compile
[INFO] |  |     |  \- org.apache.xmlbeans:xmlbeans:jar:2.6.0:compile
[INFO] |  |     |     \- stax:stax-api:jar:1.0.1:compile


Signed-off-by: HARPER Jon <7905038331b7ca94539091550dbf35972a05f5f5@gmail.com>
powsybl/powsybl-core,powsybl/powsybl-core,powsybl/powsybl-core