Don't expose TypeWithDict property mask

[wmtan]

In order to modify TypeWithDict so that it can handle types that are pointers or C-style arrays without header parsing, it is necessary to use additional bits in the property mask.
This means that user calls must not be allowed to arbitrarily set bits in the property mask. The property mask is currently an argument to several public constructors of TypeWithDict.
For each such public constructor, this pull request either removes it or makes it private. Only two lines of code outside the framework are affected.
Please merge this request as soon as convenient.

[cmsbuild]

A new Pull Request was created by @wmtan for CMSSW_7_4_ROOT6_X.

Don't expose TypeWithDict property mask

It involves the following packages:

CommonTools/Utils
FWCore/Utilities

@nclopezo, @monttj, @cmsbuild, @Dr15Jones, @StoyanStoynev, @slava77, @vadler, @ktf can you please review it and eventually sign? Thanks.
@Martin-Grunewald, @wddgit this is something you requested to watch as well.
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[ktf]

Root6. Bypassing.