tl;dr During ISS assembly the station maneuvered more than it does these days.
You are correct that the docked Shuttle / ISS stack maneuvered during the STS-115 mission.
The planned attitudes for the last several Shuttle missions are available in the Attitude Timeline sections of their flightplans, published at the JSC FDF page. The STS-115 flight plan is here.
Referencing that (pp 4-5 and 4-6), we can see that for the majority of the docked phase the stack flew in a Bias -XLV -ZVV attitude, but maneuvered to a couple of XPOP attitudes for deployment of the solar arrays installed by the mission.
ISS will maneuver to the 4A Solar Array Deploy attitude. During the
first insulation [sic] period after post sleep, the crew is expected to
deploy the 4A Solar Array mast to 15.5 bays (49%) then to 31.5 bays
(100%). After 4A is deployed and visual verifications are complete,
the SSRMS will be set up in preparation for 2A Solar Array Deploy.
ISS will maneuver to the 2A Solar Array Deploy attitude and hand over
attitude control to shuttle. Shuttle will maintain attitude control
during the 2A deploy and for an additional insulation [sic] period. The 2A
Solar Array mast is deployed to 15.5 bays (49%), held for 30 minutes
for thermal conditioning and then complete deployment to 31.5 bays
(100%). The timeline protects for 1 insulation [sic] period per Solar Array
and an additional insulation [sic] period for a contingency deploy. After
insolation periods, due to ISS thermal a 6 hr. recovery period in the
nominal attitude is required prior to another attempt at deploying.
Shuttle will maneuver back to the nominal TEA attitude prior to
handing attitude control back over to ISS.
- -XLV -ZVV means the ISS negative X axis is pointed to the local vertical and the negative Z axis is pointed into the velocity vector. This "biased -XLV -ZVV" attitude was a torque equilibrium attitude for the stack at this stage of ISS construction when the station was asymmetrical. Torque equilibrium attitudes are explained here.
- XPOP means that the ISS X axis is perpendicular to the orbital plane.
The X-Axis Perpendicular to Orbit Plane (XPOP) reference frame is
shown in Figure C-3. XPOP is a quasi-inertial reference frame that can
be visualized by a 90° yaw of the LVLH frame at orbital noon. The
X-axis points out of plane, while both the Y- and Z-axes lie in the
orbital plane. Note that unlike LVLH, which is rotating with the
Station as the Station rotates about the Earth, XPOP remains fixed
with the Station X-axis pointing out of plane and the Z-axis is
aligned with the orbit noon vector. XPOP is a “quasi-inertial”
reference frame, because as the orbital plane slowly regresses, the
XPOP reference frame also regresses to keep the X-axis pointing out of
the orbital plane.
(XPOP description and image from here)
During the early, asymmetrical stages of ISS construction, various attitudes were used. Some other ones are discussed here. I can't find the attitude that the proto-ISS was flying in before STS-115 docking, but it was yet another attitude - the flight plan states "The shuttle will maneuver the stack into the Bias -XLV +ZVV attitude" after docking.