[M108 Migration][MM] Create MediaPlayerESPlusPlayer as multiple instances.

[M108 Migration][MM] Create MediaPlayerESPlusPlayer as multiple instances.

MediaPlayerESPlusPlayer is created as singleton before, previously, but it caused an issue
that no video can be played in multi-video content.
This patch therefore changes MediaPlayerESPlusPlayer to be created as multiple instances and
it makes the latest video be played in multi-video content.

References:
https://review.tizen.org/gerrit/276973/
https://review.tizen.org/gerrit/277230/

Change-Id: Ifeb2e3af55bd5eba2cb58adcda2132d16d533d24
Signed-off-by: Suhaspoornachandra <s.poornachan@samsung.com>