Downgraded version of support library in order to support travis builds.
Downgraded version of support library in order to support travis builds.

Kolbeinsvik/dhis2-android-sdk,dhis2/dhis2-android-sdk,dhis2/dhis2-android-sdk,evestera/dhis2-android-sdk,arthurgwatidzo/dhis2-android-sdk,dhis2/dhis2-android-sdk