That plant clearly has bristly-ness along the stems (especially in the second image), which would put it in the range of Robinia hispida, Robinia fertilis, and Robinia viscosa - but not Robinia pseudoacacia.
Great botanists have a hard time telling the bristly locust group apart, without all the pertinent parts present. I had a hard time discerning whether I was seeing blue flowers or something more in the lavendar to pink range, based on the photography and lighting of the landscape. I can see pink flower buds in the third image.
Robinia hispida is a spreading suckering shrub that only reaches 6-10', so your plant is right in its sweet spot. It would rather be in a really dry spot, so if your plant is in a wetter zone near water, that may be suppressing its growth somewhat.
You could clip a piece off of this plant, and photograph it against a neutral background like a sidewalk, driveway, or table top - and really show the leaves top/bottom, the stems/bristliness, and flowers. This would be good documentation for identification, and an opportunity to bulk up the Plants Database images.
