Changes

Use main com.ibm.icu bundle
The basic ICU bundle com.ibm.icu.base has been replaced with the main 
com.ibm.icu bundle in the Equinox Target Feature of RAP Runtime. Use 
this one instead of the smaller base bundle.
Change-Id: I8320e24726f7e63b5ff01e9f1b7660420dd134e3 Signed-off-by:
Markus Knauer <mknauer@eclipsesource.com>
 (commit: a5f1cb0)

Update build configuration for RAP Tools 3.6.0RC2
- Use Eclipse Platform build S-4.9RC2-201809060745
Change-Id: Ied34bdeeca81ace6125d8566abc1757915a5eca0 Signed-off-by:
Markus Knauer <mknauer@eclipsesource.com>
 (commit: 3ec45ac)

Remove dedicated org.apache.commons.logging from target definition
The org.apache.commons.logging bundle has been added to the target 
definition with a dedicated version 1.2.0.v20180409-1502 from the Orbit 
p2 repository.
Switch back to the main one again, and use the one provided by Eclipse 
Platform and chosen by p2.
Change-Id: I64a6d4e5b62e485fb4417272ad58fdd04fe8b659 Signed-off-by:
Markus Knauer <mknauer@eclipsesource.com>
 (commit: a74a2c4)