utPLSQL suitepath is case-insensitive

in Oddgen (Run test) window, suite paths are shown as duplicated if they are typed with upper/lower case in unit test package spec.

So from those two suitepaths:
```
--%suitepath(org.utplsql.core)
...
--%SUITEPATH(ORG.UTPLSQL.CORE)
```

We get separate trees/branches in navigator. 

Those should be converted into common (lower) case and displayed as one tree.

