You need to consult a local Texas foreclosure attorney with experience with HOA's. But, generally, when there is an auction, the new owner will have to honor your current lease. When the matter actually goes to auction, it sounds like the Homeowner's Association is going to have a difficult time finding someone interested in buying the property and satisfying their lien with tenants in the property. Consult a local foreclosure attorney on this.
There are a few options available for you but you need to speak to an attorney in your area so you can give more specific details. Seek someone who will give you a free consultation.